a) The four organic molecules needed for living things are carbohydrates, lipids, proteins, and nucleic acids. They each contain elements such as carbon, hydrogen, and oxygen.
What is organic molecules?Organic molecules are molecules that contain carbon atoms, usually in combination with other atoms such as hydrogen, oxygen, nitrogen, and sometimes other elements such as sulfur and phosphorous.
b) The monomers for carbohydrates are monosaccharides such as glucose and fructose. The monomers for lipids are fatty acids and glycerol. The monomers for proteins are amino acids. The monomers for nucleic acids are nucleotides.
c) The polymers for carbohydrates are polysaccharides such as starches and cellulose. The polymers for lipids are phospholipids and triglycerides. The polymers for proteins are polypeptides. The polymers for nucleic acids are DNA and RNA.
d) Carbohydrates are an important source of energy for living organisms. Lipids provide energy storage and are used as insulation. Proteins are necessary for growth and repair of cells, and they also act as enzymes and hormones. Nucleic acids are responsible for the storage and transfer of genetic information.
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explain how haploid (n) and diploid (2n) cells differ from each other. state which cells in the human body are diploid and which are haploid.
Meiosis is the process by which haploid cells are produced. Mitosis occurs in diploid cells. Haploid cells are exclusively employed for sex cells in higher organisms such as humans.
Except for sex cells, all other cells in higher organisms, such as humans, are diploid. The existence of a single set of chromosomes in an organism's cells is referred to as haploidy. Diploid creatures reproduce sexually (having two sets of chromosomes, one from each parent). Only the egg and sperm cells in humans are haploid.
Diploid cells reproduce through mitosis, producing daughter cells that are identical to both the parent cells and each other.
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a researcher claims that epinephrine signaling pathways controls a catabolic process in muscle cells. which of the following statements best helps justify the researchers claimanswer choicesepinephrine is a signaling molecule that binds to a transmembrane proteinthe G protein in the epinephrine signaling pathway consisst of three different subunitsphosphorylase kinase catalyzes the hydrolysis ATPglycogen phosphorylase catalyzes the conversion of glycogen to glucose-1-phosephate
Glycogen phosphorylase catalyzes the conversion of glycogen to glucose-1-phosphate the following statements best helps justify the researcher's claim.
The group of metabolic processes known as catabolism breaks down big molecules (such as polysaccharides, lipids, nucleic acids, and proteins) into smaller units that are either oxidized to liberate energy or utilized in other anabolic reactions (such as monosaccharides, fatty acids, nucleotides, and amino acids, respectively). The breakdown process in metabolism is called catabolism, and the synthesis process is called anabolism.The monomers that are produced when polymers are broken down are either used by cells to build new polymer molecules or are further broken down into simple waste products, which releases energy.
complete question:A researcher claims that the epinephrine signaling pathway controls a catabolic process in muscle cells. Which of the following statements best helps justify the researcher's claim?
a. Epinephrine is a signaling molecule that binds to a transmembrane protein.
b. The G protein in the epinephrine signaling pathway consists of three different subunits.
c. Phosphorylase kinase catalyzes the hydrolysis of ATP.
d. Glycogen phosphorylase catalyzes the conversion of glycogen to glucose-1-phosphate.
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explain why heparin is used as an anticoagulant in the treatment of thrombotic strokes but contraindicated in a subarachnoid hemorrhage.
The most common cause of a stroke is a clot blocking a brain artery. Heparin would prevent new clots from forming. It is contraindicated in cases of subarachnoid hemorrhage because it is ineffective in treating bleeding from damaged arteries.
The majority of the contraindications to intravenous (IV) recombinant tissue plasminogen activator (rtPA) injection began as exclusion criteria in large stroke trials.
Expert consensus was used to develop these for the National Institute of Neurological Disorders and Stroke (NINDS) experiment. Despite the fact that the safety and efficacy of IV rtPA have been consistently established in major worldwide observational studies over the last 20 years, most patients with acute ischemic stroke remain untreated.
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explain why skeletal muscle fibers appear striated ?
Actin and myosin repeating bands, which are found along the length of myofibrils, give skeletal muscle fibers their striated appearance.
A skeletal muscle cell makes up every skeletal muscle fiber. These enormously massive cells can reach diameters of 100 µm and lengths of 30 cm. A skeletal muscle fiber's sarcolemma is its plasma membrane. Action potentials are conducted at the sarcolemma, which causes muscles to contract. Myofibrils, long, cylindrical structures that run parallel to the muscle fiber, are found inside every muscle fiber.
Actin and myosin repeating bands, which are present along the length of myofibrils, give skeletal muscle tissue its striated appearance. Dark The arrangement of myofibrils in the cell gives the appearance of striated or banded patterns throughout the entire cell.
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what is a common difference between paroxysmal cold hemoglobinuria (pch) and cold hemagglutinin disease (chd)?
In paroxysmal cold hemoglobinuria (PCH), the autoantibody specificity is most commonly anti-I. Cold hemagglutinin disease (CHD) is caused by an IgM antibody with a broad thermal range.
What is a common difference between paroxysmal cold hemoglobinuria (pch) and cold hemagglutinin disease (chd)?However, unlike cold hemagglutinin disease, in which the IgM-complement interaction results in the cells' removal (via extravascular phagocytosis), paroxysmal cold hemoglobinuria occurs upon completion of complement lysis within the vascular circulation.
Cold agglutinin disease (CAD) is a form of autoimmune hemolytic anemia (AIHA) in which cold agglutinins (IgM autoantibodies against red blood cell [RBC] antigens with an optimum temperature of 3 to 4°C) can cause clinical symptoms related to RBC agglutination in cooler parts of the body and hemolytic
Paroxysmal cold hemoglobinuria (PCH, also called Donath-Landsteiner hemolytic anemia or Donath-Landsteiner syndrome) is an uncommon type of autoimmune hemolytic anemia (AIHA) in which autoantibodies to red blood cells bind to the cells in cold temperatures and fix complement, which can cause intravascular hemolysis.
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What are some examples of environmental factors?
The examples of environmental factors includes the biotic factors like animals, plants, microorganisms as well as the abiotic factors like soil, wind, temperature, water, etc.
Environmental factors are the living and the non-living components that make up the surroundings. The presence of both the living and non-living components is essential in the ecosystem because both can function only upon being interdependent on each other.
Microorganisms are the extremely small living organisms that cannot be visualized through unaided eyes. The examples include bacterial, virus, fungi, etc. The microorganisms can be both useful as well as harmful for the large living organisms.
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ap bio unit 3 examleave the first ratingterms in this set (58)what is the term for metabolicpathways that release storedenergy by breaking downcomplex molecules.
Catabolism is the metabolic pathway that releases stored energy by breaking down complex molecules.
There are two types of metabolisms: anabolism and catabolism. Something is synthesized in anabolism, whereas catabolism performs the exact opposite of anabolism.
The breakdown of complex molecules into simpler ones by catabolic pathways typically results in the release of energy. In catabolic pathways, the energy that is stored in the bonds of complex molecules like glucose and fats is released.
The catabolic, or respiration-driven breakdown of complex organic molecules into water and carbon dioxide results in the storage of released energy in ATP molecules.
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which of the following is evidence that would support the claim that DNA has been transcribed into RNA
Answer:
a DNA sequence ACGGGTAAGG will be transcribed into the mRNA sequence UGCCCAUUCC.
Explanation:
g the value of the membrane potential at the peak of the action potential is 25 mv. which ion species is most conductive at the peak of the action potential
At the peak of the action potential, the membrane potential is at its most depolarized state, meaning that the inside of the cell is more positively charged than the outside.
This is caused by the rapid influx of positively charged ions, such as sodium (Na+), into the cell. Therefore, at the peak of the action potential, sodium ions (Na+) are the most conductive.
During an action potential, the membrane potential of a neuron changes rapidly from a negative resting potential to a positive peak potential. This change in membrane potential is caused by the movement of ions across the cell membrane, which is controlled by ion channels.
At the resting potential, the membrane is relatively impermeable to positively charged ions, such as sodium (Na+), and there is a higher concentration of negatively charged ions, such as chloride (Cl-), inside the cell. As a result, the cell acquires a negative charge inside and a positive charge outside.
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Precipitation falls to the ground and eventually ends up in the ocean. Which of the following is the most direct way for the water to get from the soil to the ocean?A. By way of a recharge zone with a low percolation rateB. By way of an open watershedC. By way of a closed watershedD. By way of thermohaline circulation within an aquifer
The most direct way for water to get from the soil to the ocean is by way of an open watershed. The correct answer is B.
An open watershed is a land area where precipitation flows into a stream, river, or other body of water, which then flows into the ocean. This path is considered the most direct way for water to travel from the soil to the ocean. The water does not have to pass through a recharge zone, which is an area where water percolates through the soil and into an aquifer. In a closed watershed, the water flows into a lake or other closed body of water, which may not flow into the ocean. In thermohaline circulation, water is circulated within an aquifer and not directly reaches the ocean. Open watersheds provide the most direct route for water to travel from the soil to the ocean.
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If you started with a fossil sample that has 2000 grams of potassium 40, how much would be left after 4 - half lives?
A fossil sample containing 2000 grams of k+ 40 in the beginning will contain 12.5 grams or potassium 40 during four half lifetimes, or 5200 million years.
Describe a fossil.The preserved remnants of organisms and plants that were submerged in sediments like sand and mud beneath ancient seas, lakes, and rivers are known as fossils. Any preserved sign of life that seems to be typically older than 10,000 years is considered a fossil.
How are fossils created?Erosion, which is made up of tiny rocks, bury this. Sediment surrounding the skeleton accumulates as additional layers of sediment are added on top.
= 1.277 x 109 years.
So, 4 half lives = 4 x (1.277 x 109 )
= 5.108 x 109 years
molecule = (1/2)n x original molecule.
amount of potassium 40 ( K40) = (1/2)4 x 2000 g
= 2000/16
= 12.5 g.
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b) Pick an organism in the list above and describe how one of its structures allows it to survive in its environment. (1 point) Think about how one part of the organism's body is designed to do a specific job well.
Answer:B what is this question
Explanation:
please specify the list of organisms you are referring to. The answer to this question depends on the organism you choose.
Which type of psychoactive drug is used medically to block pain messages to the brain? (a) Depressants, (b) Hallucinogens, (c) Opiates, (d) Stimulants.
Opiates type of psychoactive drug is used medically to block pain messages to the brain. It is given medically to treat the patient with extreme pain condition.
Opioids, sometimes known as narcotics, are drugs that doctors recommend to relieve severe or chronic pain. People with backaches and chronic headaches utilize them. Opioids bind to opioid receptors, which are proteins found on nerve cells in the brain, spinal cord, gut, and other areas of the body. When this occurs, the opioids stop the brain from receiving pain signals that are delivered from the body through the spinal cord. Opioids involve considerable dangers and can be extremely addictive even if they can successfully treat pain. When opioids are used to treat chronic pain over an extended length of time, the risk of addiction is particularly high.
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Cyanides inhibit lactose permease by A. Competing with lactose for the binding site on permease B. Abolishing the lactose gradient between the inside and outside of the cell C. Abolishing the proton gradient between the inside and outside of the cell D. Blocking conformational changes of the transporter
Cyanides inhibit lactose permease abolishing the proton gradient between the inside and outside of the cell.
In general , Lactose Permease is a transmembrane protein that helps in the transport of lactose across the phospholipid bi-layer of the cell membrane. This transport mechanism can also be defined as a secondary way of active transport because it alters the inwardly directed H+ electrochemical gradient for an energy source.
So, lac repressor protein get attached with the operator and blocks RNA polymerase from binding to the promoter and transcribing the operon. Hence, promoter is considered as the binding site for RNA polymerase, enzyme that initiate transcription.
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Krista wants to explain a new sustainable farming technique her company has been testing with farmers. Which of the following models are appropriate options to use in her explanation?
1. Infographic
II. Graph
III. 3-D model
Oland II
OII and III
OI and III
Ol only
Krista wants to explain a new sustainable farming technique her company has been testing with farmers, so the best ways are the infographic and the graph that are in the first option, as both I and II are correct for this.
What is the significance of sustainable farming?It is a type of farming that regulates the soil, the climate, and the overall atmosphere, along with the health of the animals and the plants. There are different forms of sustainable farming, such as organic farming, where pesticides are not used.
Hence, Krista wants to explain a new sustainable farming technique her company has been testing with farmers, so the best ways are the infographic and the graph that are in the first option, as both I and II are correct for this.
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Saturated fats found in animal products, such as bacon and cheese, are also called
a. amino acids.
b. cholesterol.
c. lipids.
d. triglycerides.
Answer: d. triglycerides
Explanation:
Triglycerides are a type of fat that is typically found in animal-based foods such as butter, cream, and fatty meats, as well as coconut and palm oil. They are solid at room temperature and are known to raise the levels of LDL cholesterol in the blood which can increase the risk of heart disease.
I hope this helps :)
Answer:
I think its c
I am sorry if my answer is wrong
Explanation:
Saturated fats found in animal products, such as bacon and cheese, are also called long-chain fatty acids. These fats are typically solid at room temperature and are known to increase the levels of LDL cholesterol in the blood, which can increase the risk of heart disease if consumed in excess. Saturated fats are also found in some plant-based oils, such as coconut oil and palm oil, and in processed foods like baked goods and fried foods.
Lipids are a broad group of naturally occurring molecules that include fats, waxes, steroids, and certain fat-soluble vitamins. Lipids are important components of living cells, and they play a variety of roles in the body, including energy storage, insulation, and cell membrane structure.
Fats, also known as triglycerides, are the most common type of lipid. They are composed of three fatty acid molecules and one glycerol molecule. Saturated fats, which are typically solid at room temperature, are known to increase the levels of LDL cholesterol in the blood, which can increase the risk of heart disease if consumed in excess. Unsaturated fats, which are typically liquid at room temperature, are considered to be healthier.
Waxes are lipids that are composed of long chain fatty acids and alcohols. They are used in various products such as candles, cosmetics, and food packaging.
Steroids are lipids that are composed of four fused carbon rings. They are important hormones in the body such as testosterone and estrogen.
Lipid-soluble vitamins such as vitamin A, D, E, and K are required in small amounts for good health and are stored in the body's fatty tissue.
In summary, lipids are a diverse group of molecules that play important roles in the body, including energy storage, insulation, and cell membrane structure. They include fats, waxes, steroids, and some fat-soluble vitamins, and their properties and functions vary depending on their chemical structure.
deep-sea are composed almost entirely of the hard outer coverings of single-celled marine organisms. their chemical composition is either or .
Biogenous oozes; calcareous or siliceous , Any pelagic silt that contains more than 30% skeletal material is referred to as biogenic ooze. Carbonate (or calcareous) ooze or siliceous ooze can make up these deposits.
Calcareous ooze, the most abundant of all biogenous sediments, is formed by creatures with calcium-based shells (also known as tests), such as foraminifera, a kind of zooplankton.
The ocean strata are dominated by calcareous ooze. Foraminifera and other creatures with calcium-based shells are more plentiful and extensively dispersed throughout the world's ocean basins than animals with silica-based shells.
The oozes are classified as calcareous oozes (containing calcium carbonate skeletons) and siliceous oozes (containing silica skeletons), and then further classified based on the major skeleton type.
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Which of the following endocrine glands produces over 30 hormones called corticosteroids?
-Thyroid
-Thymus
-Adrenal Cortex
-Adrenal medulla
what is the name of the theory which states that organisms are derived from the assembly and reorganization, somewhat de novo, of substances in the egg?
Epigenesis is the theory which states that organisms are derived from the assembly and reorganization, somewhat de novo, of substances in the egg.
The process through which organisms, including plants, animals, and fungi, evolve from a seed, spore, or egg through a number of phases during which cells divide and organs emerge is known as epigenesis (or, in contrast to preformationism, neoformationism). Aristotle coined the term "epigenetics" in his essay On the Generation of Animals. The historical rejection of epigenesis was hampered by creationist ideas of life's origins, despite the fact that it seems evident in the genetic era of today. However, a protracted and contentious dispute among biologists in the late 18th century led to the eventual replacement of the long-standing preformationist theory with epigenesis.
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some bacteria have mutation that give them immunity to penicillin, while those without the mutation die off. the surviving bacteria reproduce. this means that doctors have to more carefully prescribe antibiotics. what process allows this kind of change in the bacteria population?
The process that allows this kind of change in the bacterial population is called antibiotic resistance. It occurs when bacteria evolve mechanisms to survive exposure to antibiotics.
This can happen through various mechanisms such as mutation or acquisition of resistance genes from other bacteria through horizontal gene transfer. The mutations that give the bacteria immunity to penicillin are examples of genetic changes that can confer antibiotic resistance. When the bacteria with these mutations are exposed to the antibiotic, they are able to survive and reproduce, passing on the resistance to their offspring. This leads to a shift in the population towards antibiotic-resistant strains. Overuse and misuse of antibiotics can also increase the rate of antibiotic resistance, as it creates more opportunities for the bacteria to be exposed to the drugs and evolve resistance.
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A herd of elephants is grazing in a grassland dotted with small trees and shrubs. Zebra’s are grazing alongside them. A group of rhino is bathing in a lake nearby.
The elephants represent?
a.) community
b.) population
c.) biosphere
d.) ecosystem
The elephants represent population. All nationals present in, or temporarily absent from, a country, as well as foreigners permanently resident in a country, are considered population. Correct option (B).
All citizens present in, or temporarily absent from, a country, as well as foreigners permanently resident in a country, are characterized as population. This statistic depicts the average number of people who reside in a certain location. The yearly changes in population caused by births, deaths, and net migration during the year are referred to as growth rates.
National military forces stationed abroad; commercial seafarers at sea; diplomatic staff stationed abroad; civilian immigrants residing in the country; displaced individuals resident in the country comprise the total population. It does, however, preclude the following: foreign armed forces stationed in the nation; foreign diplomatic staff stationed in the country; and civilian immigrants visiting the country temporarily. A typical demographic technique is population forecasts.
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explain how the digestive system works. be sure use the terms physical digestion, chemical digestion, metabolism, nutrients, and molecules in your response.
Food is broken down into nutrients such as carbs, lipids, and proteins via the digestive system. They are then taken into the circulation and used by the body for energy, development, and repair.
Unused materials are disposed of like feces . Chemical digestion is the process of breaking down food bindings to transform them into organic molecules. The mechanical breakdown of food is known as physical digestion.
Ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and feces are the six acts involved in digestion. The first of these processes, ingestion, refers to the passage of food the mouth into the alimentary canal.
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upon fertilization, the egg and sperm fuse to form a single cell called a(n) ________.
A) zygote
B) gamete
C) embryo
D) gonad
Upon fertilization, the egg and sperm fuse to form a single cell called an A) zygote.
Fertilization and meiosis—the process of making haploid cells from diploid ones—are two key aspects of the life cycle that are shared by all species that reproduce sexually.
A zygote is formed when the sperm and eggs are combined during fertilization. With the help of mitosis, the zygote divides into a mature human. The first diploid cell that forms when male and female gametes fuse to form an embryo is called a zygote.
During the first week of fertilization, the zygote stage is formed.
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What type of artificial selection is used when animals with desired characteristics are mated to produce offspring with those desired traits?
Selective breeding type of artificial selection is used when animals with desired characteristics are mated to produce offspring with those desired traits.
Selective breeding, also known as artificial selection, is the process by which humans use animal breeding and plant breeding to selectively develop specific phenotypic traits (characteristics) by deciding which typically animal or plant males and females will sexually reproduce and produce offspring together. Domesticated animals are known as breeds and are often bred by a professional breeder, whereas domesticated plants are known as variations, cultivars, or breeds. A crossbreed is created when two separate purebred animals of the same breed crossbreed, and hybrid plants result from this crossbreeding. Major crops are typically the result of professional breeding; amateurs and professionals alike may breed flowers, vegetables, and fruit trees.
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question 51 in addition to regulating executive function, the frontal lobe is also responsible for: initiating voluntary movement. regulating hunger, thirst, and sex drive. regulating breathing, heart rate, and blood pressure. question 51 answer choices a. i only b. ii only c. i and ii only d. i and iii only
The frontal lobe controls executive function in addition to being in charge of triggering voluntary movement.
Item I is accurate: The frontal lobe houses the primary motor cortex, which is in charge of initiating voluntary movement.
False, according to Item II: The hypothalamus, which is situated in the diencephalon, just above the brain stem, and controls feelings of satiety, sexual drive, and hunger
Item III is untrue because the medulla oblongata, a structure in the back of the brain, controls things like blood pressure, heart rate, and breathing.
The frontal lobes are crucial for managing higher order executive functions, expressive language, and voluntary movement.
The precentral gyrus of the frontal lobe corresponds to the motor cortex. It is in charge of organising, managing, and carrying out voluntary movements.
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Would eating invasive species solve the problem? Why? I will give brainly to the first person that answers
Answer:
Eating invasive species can be seen as a way to control their population and reduce their impact on the ecosystem. However, it is not a solution to the problem of invasive species on its own and it does not fully address the issue.
One reason for this is that it may not be feasible to harvest and consume enough of the invasive species to have a significant impact on their population. Additionally, in some cases, invasive species may contain harmful chemicals or toxins, making them unsafe to eat.
Another reason is that eating invasive species does not address the root cause of their introduction and spread. Invasive species are often introduced through human activities such as trade, transportation, or development. Therefore, preventing the introduction and spread of invasive species in the first place, through measures such as stricter regulations, monitoring and early detection, is a more effective approach to controlling their populations and mitigating their impacts.
Additionally, it is important to consider that many people do not have access to these invasive species and also it may not be culturally acceptable for some people to consume them.
In conclusion, while eating invasive species can be a way to control their population, it is not a complete solution to the problem and it should be used in conjunction with other methods such as preventing their introduction, monitoring and early detection and controlling their spread to effectively address the problem of invasive species.
Answer
It does happen. There are cookbooks for invasive species.
Explanation: .
Which of the following characteristics is not shared by Archaea, Bacteria, and Eukarya?
a. Cytoskeleton
b. Semiconservative replication of DNA
c. Ribosomes
d. Cell membranes
e. Glycolysis
Neither Archaea nor Bacteria nor Eukarya have the same cytoskeleton features.
What is Cytoskeleton?A framework called the cytoskeleton helps cells keep their internal structure and order. Additionally, it offers mechanical assistance so that cells can perform necessary processes like motility and division. There isn't just one cytoskeletal element.
(SY-toh-SKEH-leh-tun) the extensive network of chemicals and protein fibres that provides the body's cells form and structure Organelle structures and other chemicals present in the fluid inside the cell are organised by the cytoskeleton.
The cytoskeleton's core duties include controlling how cells are shaped, supplying mechanical support and integrity, allowing for cell movement, and facilitating the intracellular movement of supramolecular structures, vesicles, and even organelles.
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Which of these things is a primary ingredient of humus?answer choices- dead plant material- rocks from the earth's crust- minerals- metals
Dead plant material is a primary ingredient of humus.It is a substance that is a part of the biospere. The secondary microbial and animal products as well as the source materials have different compositions, which affects how humus is produced.
Plants scatter leaves, twigs, and other debris to the ground, which accumulates.When plant and animal debris decomposes in the soil, humus, a black, organic substance, is created.Plants scatter leaves, twigs, and other debris to the ground, which accumulates. Leaf litter is the name of this substance. Animal carcasses contribute to the litter after they pass away. All of this trash disintegrates over time. This implies that it decomposes into its most fundamental chemical components. Numerous of these substances are vital nutrients for the earth and living things that depend on it, such plants.
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what is the term given to an organism that becomes able to reproduce (accelerated reproductive development) before the body is an adult (somatic development).
Pedomorphosis is the term given to an organism that becomes able to reproduce before the body is an adult (somatic development).
Pedomorphosis, is the characteristic an organism that its juvenile or larval traits can appear later in the life. Pedomorphosis is an substitutive process to metamorphosis in which adults retain larval traits at the adult stage. This process is more common in newts and salamanders, where larvae influence s.e.x.ual maturity without losing their gills.
Pedomorphosis and neoteny represent two qualitatively different phenomena also known as neoteny is an adaptive modification of ontogeny, we can also say that pedomorphosis is its conversion in the course of evolution.
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What is a nucleosome?
A. a defensive layer that forms when the
cell is under attack
B. a structure that protects the nucleus
from extreme temperatures
C. genetic material formed from DNA and
histones
D. a structure that allows materials in and
out of the nucleus
Answer:
The answer is C.
Explanation:
Chromosal DNA is packaged inside microscopic nuclei with the help of histones
