natural compounds I mean all organic compounds
Explanation:
many organic compounds are obtained directly from the plants and animal sources by suitable method of installation a few filling here example are carbohydrate cellulose sugar and starches for prediction of hunters of useful organic substances such as solved synthetic rubber explosive and plastic
Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?
testes
ovaries
prostate gland
vulva
Answer:
testes
Explanation:
The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested. In males, testosterone directly increases size and mass of muscles, vocal cords, and bones, deepening the voice, and changing the shape of the face and skeleton.
Answer:
testes
Explanation:
Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics and their developments are affected by testes
For plants living in a dry areas, explain a possible conflict between the need to obtain carbon dioxide for photosynthesis and the need to conserve water.
Plants living in dry areas face conflict.
EXPLANATION:
Since they live in dry areas they will undergo more transpiration. If they open stomata during the day there will be excessive loss of water vapor that will result in their death. Therefore plants living in this area open the stomata during the night to obtain Carbon dioxide.This checks the loss of water through transpiration and provides the carbon dioxide for photosynthesis.Abstract
Plants regularly face dry conditions. Not having enough water poses a serious threat to a plant’s ability to grow and develop or even just survive! If plants die, we will not have enough food to eat! How do plants manage to survive during water shortages? They must somehow be able to sense, respond, and adapt to changes in water availability. They do this through a range of techniques that allow for a plant to combat water shortages. A plant’s structural “armor” helps it to decrease the amount of water it loses to the environment and increase water storage. Plants respond to water shortages in very complex ways. These responses can include changes in the plants’ growth and in their ability to protect themselves against toxic chemicals that accumulate in the plant during dry periods. All of a plant’s responses are directly controlled by the plant’s genes. If we can understand the genes that are involved in protecting plants against drought, in the future we might be able to make genetically modified crops that can tolerate global warming and climate changes.
Have you heard people speaking about global warming and climate change? Do you know what these terms mean? These terms basically imply that the earth is getting hotter every year. These higher temperatures lead to unexpected and unusual weather patterns. One of these extreme weather patterns is frequent and severe droughts. Droughts are very long dry periods without any rain. What do severe droughts mean for plants? Well, plants are sessileAn organism that can’t move and stays in one place, like a plant., which means they stay in one place and can’t move around like we can. They can’t pull up their roots and relocate to a shady or damp spot. Therefore, plants somehow need to deal with these ever-increasing drought conditions, or they will simply die. Remember, plants are our food. We eat plants raw or cooked (those vegetables your mom insists you eat!) or processed, like your favorite box of breakfast cereal [which is made from wheat or maize (corn)]. So, if plants die because of droughts, we will not have enough food to eat!
If there is no water around, what can plants do to survive? Amazingly, all plants seem to have a number of genes for drought-defense strategies encoded in their DNA. Genes are small sections of DNA, like chapters in a book. How they use these genes determines their ability to survive drought.
Some plants are drought-resistant. When we talk about drought-resistant plants, we mean plants that can withstand dry conditions without dying. A drought-resistant plant can survive drought by using three defense strategies: escaping, avoiding or tolerating the loss of water [1]. Drought tolerant plants are quite rare in nature and can endure long periods with no water at all. Some of the most spectacular drought tolerant plants are called resurrection plants. Resurrection plants are able to survive long periods (up to 3 years!) without any water. However, give them a little water and they will spring back to life in a day or two. Other drought-resistant plants may not be as spectacular, but they too can survive short periods of drought using special techniques and defense strategies.
Some Plants Have Special Structures That Help Them to Survive in Drought Conditions
Some plants are able to survive droughts because of their unique structures. These structural features include the external armor of plants that protects them against water loss, as well as tools to help the plants absorb and store water. Drought-resistant plants can be specially adapted to live and survive in very dry environments. These plants often look quite different from plants living in areas where water is easily available. The drought-resistant plants normally have special “avoidance” (one of the defense adaptations!) features to make sure less water is lost to the environment or that more water gets absorbed and stored in the plant. Plants called desert succulentsPlants that have thickened and fleshy leaves and stems, in which water can be stored. are a good example of plants that have drought avoidance strategies [2]. Desert succulents have thick fleshy leaves, which often don’t resemble leaves at all, and they have a thick waxy layer to prevent water loss. Desert succulents also have extensive root systems that search for water under the dry desert soil (Figure 1). Some succulents have specialized roots that form large bulb structures, which are actually underground water reservoirs for the plant. These plants can survive years of drought using the water stored in their bulbs.
The cell membrane is said to be:
[tex]\huge\mathfrak\red{ANSWER}[/tex]
Semi-PermeableExplanation is in the pic
Hope it heps
Answer:
The cell membrane is said to be semi-permeable.Explanation:What is meant by a semi-permeable membrane?✈This is a membrane which allow only certain substances to go in or out of the cell.
The Cell membrane of living cells is said to be a semi permeable membrane.
Hope it helps!
cells that are thick in the middle and tapered towards the end are called _________ cells
Cells that are thick in the middle and tapered towards the end are called fusiform cells
What are fusiform cells?Fusiform cells are those cells that has a spindle-like structure which means that it is thinner at the extremes and larger at the center.
A typical example of fusiform cell are the cells of the dorsal cochlear nucleus (DCN).
Therefore, cells that are thick in the middle and tapered towards the end are called fusiform cells
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Read the passage from "Names/Nombres" by Julia Alvarez.
Our first few years in the States, though, ethnicity was not yet “in.” Those were the blond, blue-eyed, bobby-sock years of junior high and high school before the sixties ushered in peasant blouses, hoop earrings, serapes. My initial desire to be known by my correct Dominican name faded. I just wanted to be Judy and merge with the Sallys and Janes in my class. But, inevitably, my accent and coloring gave me away.
Which detail best conveys the main idea that Alvarez wants to fit into her new culture?
Our first few years in the States, though, ethnicity was not yet “in.”
Those were the blond, blue-eyed, bobby-sock years of junior high and high school . . .
. . . before the sixties ushered in peasant blouses, hoop earrings, serapes.
I just wanted to be Judy and merge with the Sallys and Janes in my class.
The detail that best conveys the main idea that Alvarez wants to fit into her new culture is as follows:
I just wanted to be Judy and merge with the Sallys and Janes in my class.Thus, the correct option is D.
What is Ethnicity?Ethnicity may be expressed as the sociable group a person belongs to, and either recognizes with or is determined by others, as a consequence of a mixture of cultural and other elements including the tongue, diet, belief, origin, and physical attributes traditionally associated with race.
The context of this story illustrates the difficulty faced by Alvarez to fit into the American culture as she belongs of Latin origin.
She desired to match in and be tolerated in this civilization and that's why she expresses that she wanted to connect with the Sallys and Janes in her classroom, as they had the American prototype and culture that everyone respected.
Therefore, it is well described above.
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What causes an ionc bond?
3. what is an ecosystem?
o a group of animals of all the same species in an area
a group of living and nonliving things
the process for converting energy into food
the relationship between plants and animals
Answer:
A group of animals of all the same species in an area.
Explanation:
why being heterozygous for sickle cell anemia in an area with high malaria rates is most beneficial when compared to homozygous dominant or recessive individuals.
help plssssssss
Answer:
Heterozygous people for sickle cell anemia are more resistant to the debilitating effects of malaria than the normal homozygous people.
Which is considered a chemical mutation? tanning beds, tobacco, X-rays, or sunlight
Explanation:
chemical mutations are those chemical which change the DNA molecule in such an extent that it function and make different expressions of gene
tobacco is considered as chemical mutation
Which best summarizes the flow of energy in a producer?
O Sun > ADP > muscle cells
O Sun > mitochondria > CoH1206
O Sun > chloroplasts > mitochondria
O Sun > mitochondria > chloroplasts
The correct answer to the given question is O Sun > chloroplasts > mitochondria ie. Option (C)
Chemical reactions are how energy moves through living things. One set of substances, known as reactants, are transformed into another set, known as products, during each chemical reaction.Such reactions take place in plants as a result of the sunlight-to-chemical energy conversion process, which powers plant growth and other operations.In particular structures known as chloroplasts, this process, referred to as photosynthesis, involves the combination of carbon dioxide and simple sugars to create more complex carbohydrates. The cells of plants, algae, and some protists include these membrane-bound organelles called chloroplasts.From one atom or molecule to another, electrons move. The relevance of these oxidation-reduction (or redox) reactions in mitochondria to living systems cannot be overstated.In this manner, molecules that carry energy are created and put to use for efficient energy transfer
Hence, the correct answer is O Sun > chloroplasts > mitochondria ie. Option (C)
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What reduces friction around the lungs as they expand and contract?
The answer choice which reduces friction around the lungs as they expand and contract is; Choice C; Pleural fluid.
What reduces friction around the lungs as they expand and contract?A membrane with two layers, termed the pleura surrounds the lungs. A slippery liquid called pleural fluid acts as a lubricant to reduce friction in the space between those two layers, called pleural cavity during breathing.
Remarks:
A. Surfactant
B. Synovial fluid
C. Pleural fluid
D. Mucus
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What is the function of lacI in the regulation of the lac operon? It is the operator that mediates the transcription of the structural genes. It is a structural gene that encodes permease. It encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks expression of the structural genes. It is the promoter that mediates the transcription of the operon. It encodes a repressor that, in the presence of lactose, binds to the lac operator and blocks expression of the structural genes.
The function of lacI in the regulation of the lac operon is that it encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks the expression of the structural genes. Thus, the correct option is C.
What is Lac operon?Lac operon may be defined as an operon or a set of genes with a single promoter that encodes genes for the carrier and metabolism of lactose in E. coli and other bacterial species.
The concept of the operon was first proposed by Jacob and Monod in 1961.
The lacI gene product, the lac repressor, is expressed from a separate transcriptional unit upstream from the operator.
When lactose is absent, the lacI gene regulates and produces repressor mRNA which translates repression.
Therefore, it is well described above.
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Within a decade of the introduction of a new insecticide, nearly all of the descendants of the target pests were immune to the usual-sized dose. The most likely explanation for this immunity to the insecticide is that…?
Answer:
mqa-vivn-jei
Explanation:
truth and dare?
Answer - d: the pests developed physiological adaptations to the insecticide
Explanation: Pests become resistant by evolving physiological adaptations that protect them from the chemical.
In a laboratory, students used a stimulus that decreased the distance between R waves on an ECG. This represents a _____. increased length of time for one heartbeat and increased heart rate decreased length of time for one heartbeat and increased heart rate decreased length of time for one heartbeat and decreased heart rate increased length of time for one heartbeat and decreased heart rate
The information represents a B. decreased length of time for one heartbeat and increased heart rate.
What is stimulus?It should be noted that stimulus means a change in the structure of an organism based on the environment.
In this case, in the laboratory, the students used a stimulus that decreased the distance between R waves on an ECG. This leads to decreased length of time for one heartbeat and increased heart rate.
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What adaptations does the small intestine make for absorption?
The small intestines are well adapted for absorbing nutrients during digestion by being very long, having villi and microvilli that increase surface area, using muscular contractions to move and mix food, and receiving and housing digestive enzymes and bile that help the breakdown of food.
The adaptations in which the small intestine make for absorption is the presence of a finger-like structure called villi.
What is Villi?These are finger-like structures found in the small intestine which increase the surface area for absorption.
They possess blood vessel which ensures the nutrients are transported to other parts of the body.
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How many times does the Krebs Cycle turn for one molecule of glucose?
Two turns of Kreb's cycle are needed for one molecule of glucose.
The Kreb's CycleThe cycle represents part of the process of breaking down glucose to extract the locked energy in the form of ATP.
Each glucose molecule to be broken down first undergo glycolysis at the end of which 2 pyruvate molecules are produced.
Each turn of the Kreb's cycle requires a molecule of pyruvate. Thus, the two pyruvates molecules generated from single glucose will require 2 turns of Kreb's cycle.
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Question 7 (True/False Worth 1 points)
(05.03 LC)
The correct way to calculate population density is by dividing the total population by the land area.
O True
O False
Answer: true
Explanation:
Explain how the structure of the nephron and its associated blood vesseles enable the kidney to carry out its functions
The explanation of how the structure of the nephron and its associated blood vessels is; As described below
What is the Operation of the Kidney?The way the kidney is enabled to carry out its' functions are the processes below;
Each human kidney is made up of approximately one million filtering units called nephrons. Now, each nephron includes a filter, called the glomerulus, and a tubule.
Finally, the nephrons work through a two-step process namely;
- The glomerulus filters your blood. Ultrafiltration in glomerulus - smaller molecules filtered out in the glomerulus (e.g. glucose, water, minerals)
- The tubule returns needed substances to your blood and removes wastes.
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PLEASE HELP! I WOULD APPRECIATE IT!
Which of the following is true about Earth's freshwater, air, soil and trees? A. Although these resources are renewable, their present benefits can be reduced if used carelessly. B. Although these resources are renewable, they present very few benefits for humans. C. These resources are nonrenewable, so humans must stop using them if they are to survive. D. Although these resources are nonrenewable, humans don't have to worry about conserving them.
Which of the following is true about Earth's freshwater, air, soil and trees?
A. Although these resources are renewable, their present benefits can be reduced if used carelessly.
B. Although these resources are renewable, they present very few benefits for humans.
C. These resources are nonrenewable, so humans must stop using them if they are to survive.
D. Although these resources are nonrenewable, humans don't have to worry about conserving them
determine the following describe an acid,base, or neutral substance
According to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
What is an acid, base or neutral substance?An acid is that chemical substance capable of transferring protons (H+) to another chemical substance.A base is that chemical substance capable of capturing protons (H+) from another chemical substance.A neutral substance is one that when dissolved in water dissociates into its ions.Therefore, we can conclude that according to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
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What are homotopic brain areas? Group of answer choices regions of the cortex that are organized according to spatial maps of the environment areas in corresponding locations in the two cerebral hemispheres areas in the brain that are organized according to spatial and auditory frequency regions of the cortex found within the same cerebral hemisphere
The homotopic brain areas are the reas in the brain that are organized according to spatial and auditory frequency regions of the cortex found within the same cerebral hemisphere.
What are homotopic brain areas?It should be noted that the homotopic brain areas are the connectivity between the mirror areas of the brain hemisphere.
In this case, the homotopic brain areas are the reas in the brain that are organized according to spatial and auditory frequency regions of the cortex found within the same cerebral hemisphere.
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How does phosphorylation control protein activity?.
Answer:
Phosphorylation offers a dynamic way to regulate protein activity and subcellular localization, which is achieved through its reversibility and fast kinetics. Adding or removing a dianionic phosphate group somewhere on a protein often changes the protein's structural properties, its stability and dynamics.
Explanation:
What is the structure and function of microtubules?
Structurally microtubules are composed of alpha and beta-tubulin, whereas their functions include cell division, structural support, etc.
What are microtubules?The microtubules are key proteins present in eukaryotic cells that form part of the cytoskeleton.
Microtubules are composed of subunits of alpha and beta-tubulin that link together to form structures 24 nm thick.
In conclusion, structurally microtubules are composed of alpha and beta-tubulin, whereas their functions include cell division, structural support, etc.
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The reason that skin cells start to swell after soaking in water is that the cell membranes are
5. How can we say that added sugar is not necessary for our health (it's not), when we learned that
aerobic cellular respiration uses glucose as a fuel source? (hint - where did hunter/gatherers our
ancestors, get sugar?)
Answer:
more than likely fruits and berries
or natural sugars
The body does not require any added sugar to stay healthy. Hunters/gatherers and our ancestors consumed fruits and milk that are natural sugar to obtain energy.
What is the difference between added sugar and natural sugar?Natural sugars are found in unprocessed food such as fruits and milk.Fruits contain fructose and milk contains lactose.On the other hand, added sugars are the artificial sweeteners that we often add to our daily diet in the form of white sugars and caloric sweeteners. From the perspective of health, it is always better to opt for natural sugar that keeps our body stable energy and stable metabolism.Added sugars are harmful when consumed in higher quantities.Hence, added sugar is not necessary for our health when we have learned that aerobic cellular respiration uses glucose as a fuel source that can be obtained from natural sugar.
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Round seeds are dominant over wrinkled seeds in
the pea plants that Mendel studied. Provide the
genotypes and phenotypes of offspring produced
when a heterozygous round plant crosses with
another heterozygous round plant.
Genotype - RR - 25%, Rr - 50%, rr - 25% (1:2:1)
Phenotype - Round seeds - 75%, Wrinkled seeds - 25% (3:1)
How explain your answer?Let the letter "r" stand for the alleles, where R is round seeds and r is wrinkled seeds. A genotype is an individual's genes represented through alleles. Phenotypes are how the genes express themselves. In other words, genotypes will be written using letters, the alleles, and phenotypes will be the possible outcomes of the alleles.
Both of the parent seeds have the genotypes Rr and the phenotype of round seeds.
If you create punnet square (which had four boxes in total) 1 will have RR, 2 will have Rr, and 1 will have rr. These are the ratios for the genotypes. Each box represents 25%, so the percentages will be 25, 50, and 25. Finally, 3 of these boxes (RR and Rr) will result in round seeds because those are dominant. Only the genotype rr will result in wrinkled phenotype. Therefore, the ratio is 3:1 or 75% to 25%.
Thus, this could be the answer.
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After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are
After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are reformed into triglycerides.
Where are long chain triglycerides absorbed?As previously mentioned, MCTs do not delay gastric emptying and are absorbed faster in the intestine than MCTs, being transported via blood to the liver.
In this case, long-chain triglycerides are oils or fats of vegetable or animal origin, and are obtained from the reaction between a fatty acid and glycerol.
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The major pathway of communication between the right and left hemispheres is the:.
The major pathway of communication between the right and left hemisphere is the corpus callosum.
The cerebrum is the recognizable gray covering of the human brain, appearing to comprise the majority of its mass. The cerebral cortex is the wrinkly area; the remainder of the anatomy is hidden behind that layer. The longitudinal fissure, which is a significant gap between the two sides of the cerebrum, exists. It divides the brain into right and left cerebral hemispheres, which are two independent parts. The main channel for communication between the two hemispheres of the cerebral cortex is provided by the white matter of the corpus callosum, which is located deep inside the cerebrum.learn more about corpus callosum here: https://brainly.com/question/13094825
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Which factor helps determine the fertility rate of a group of people?
A. Wealth
B. Death rate
C. Farmland
D. Consumption rate
Suppose that a person takes a fall while hiking and develops tetanus when the pathogen enters through an open wound in their arm. They do not spread the tetanus infection to anyone else. The tetanus infection is considered to be ______.
The tetanus infection is considered to be a Droplet infection.
What is Tetanus?
Tetanus is a neurological disease which is characterized by the occurrence of spasms in the muscle.
Tetanus can be caused if initial care does not take place after the wound occurs and therefore, it is very important to immediately take care of the wound.
To treat the wound tetanus immunoglobulin and tetanus toxoids are given to the person, however, it is necessary to give the two injections using different syringes and at different sites, because the immunoglobulin can cause neutralization fo the toxoid.
Thus, this could be the answer.
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