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4
Magnesium is an alkaline earth metal with an atomic number of 12 Its in the third row in the periodic table. Which expression shows one way to find the number of
valence electrons in one atom of magnesium?
A. 12x3
B. 12 divided by 3
C. (12-8)-2
D. (12-2)+8
E. (12+2)-8
A. 12×3
Explanation:
I think
Magnesium atomic number-12
third row - 3
valence electrons in one atom of magnesium-12×3=36
Which statement correctly compares nuclei acids and carbohydrates?
They both contain carbon, but only nucleic acids contain hydrogen.
They both contain carbon, hydrogen, and oxygen in a 1:2:1 ratio.
They both contain carbon, but only carbohydrates contain oxygen
They both contain carbon, but only nucleic acids contain phosphorous.
They both contain carbon but nucleic acids contain phosphorus. So, the correct option is D.
What are nucleic acids and carbohydrates?
Nucleic acid is a naturally occurring chemical compound that is capable of being broken down to yield phosphoric acid, sugars, and a mixture of organic bases (purines and pyrimidines).
Nucleic acids are the main information-carrying molecules of the cell, and, by directing the process of protein synthesis, they determine the inherited characteristics of every living thing. The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Carbohydrate is any member of a large and diverse family of naturally occurring organic molecules that include sugars, starch, and cellulose.
Monosaccharides (simple sugars such as glucose and fructose), disaccharides (2-unit sugars such as sucrose and lactose), oligosaccharides (3-10 or more sugars), and polysaccharides are the most prevalent types (large molecules with up to 10,000 monosaccharide units, including cellulose, starch, and glycogen).
Therefore the correct option is D.
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Which option correctly describes the structure of mitochondria?
Mitochondria have an outer membrane and a folded inner membrane.
Mitochondria have a single, folded membrane.
Mitochondria have a single, unfolded membrane.
O Mitochondria have an inner membrane and a folded outer membrane.
Answer:
O Mitochondria have an inner membrane and a folded outer membrane.
Homeostasis refers to the
a. organization of cellular structures.
b. stable level of internal conditions in organisms.
c. organized structure of crystals.
d. destruction of tropical rain forests.
B is the correct answer:)
Organisms that consume only plants are any/all of the following:_____.
a. first order heterotroph
b. secondary consumer
c. primary consumer
d. second order heterotroph
e. producer
f. herbivore
Answer:
I think herbivores and primary consumers
The patient is found to have liver disease, resulting in the removal of a lobe of his liver. adaptation to the reduced size of the liver leads to ___________ of the remaining liver cells.
The adaptation to the reduced size of the liver leads to (C) compensatory hyperplasia of the remaining liver cells since the patient is found to have liver disease, resulting in the removal of a lobe of his liver.
According to the medical definition of hyperplasia, this is a particular kind of biological reaction to stress. It involves a rise in cell division, which leads to an increase in the number of cells. Organs get significantly larger as a result of cell hyperplasia.
Compensatory Hyperplasia is the proliferation of cells while they retain their differentiated form and function, and it is a hyperplasia that develops in reaction to change that occurs in the body. Hepatocyte regeneration in a damaged liver is a famous illustration. The result in the adaptation to the reduced size of the liver is Compensatory Hyperplasia.
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Question correction:
The patient is found to have liver disease, resulting in the removal of a lobe of his liver. Adaptation to the reduced size of the liver leads to ___________ of the remaining liver cells.
A) metaplasia
B) organ atrophy
C) compensatory hyperplasia
D) physiologic hypertrophy
Why does water act like a solvent with other substances
diagram of a plant cell, what is the name of structure 2?
Excuse me but where is the picture you want me to answer???
Please indicate a picture of the diagram to answer it.
Why are thick or dense smears less likely to provide a good smear preparation for microscopic.
Thick or dense smears less likely to provide a good smear preparation for microscopic because it will diminish the amount of light that can pass through making it difficult to visualize the morphology of single cells under the microscope. Some times the stain can't penetrate all of the bacteria.
What is a microscopic smear?A smear is a microscopic specimen.A swab or loop, or the edge of another slide, is used to spread the sample to be examined, such as blood or microbial culture, thinly and unevenly across the slide.Smear preparation involves spreading a small amount of sample on a slide and air drying the film before staining and microscopy.The conventional method, blood film method, drop and rest method, and water-wash method are the four types of smearing methods.Smear microscopy entails collecting a biological sample (typically sputum or other clinical material), fixing it thinly on a glass slide, and staining it with a dye that binds specifically to mycobacteria (making them easier to identify under a microscope).To learn more about microscopic smear :
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Why are cycles important in biology?
Answer:
They Are Vital As they recycle elements and store them too, and regulate the vital elements through the physical facets.These cycles depict the association between living and non-living things in the ecosystems and enable the continuous survival of ecosystems.The greatest annual input and least seasonal variation in solar radiation occurs in the.
Answer:
THE "TROPICS"Explanation:
The greatest annual input and least seasonal variation in solar radiation occurs in (e) the Tropics, where the sun angle is highest and is directly overhead at least once each year.
Sort the following substances based upon their ability to diffuse across a typical dialysis membrane.
According to the given statement the following substances based upon their ability to diffuse across a typical dialysis membrane are Permeable>Water>Ion>Glucose Impermeable>Glycogen>Protein.
What material makes up the membrane?Cell membranes of living things are composed of proteins and lipids. They are mostly made of lipids, therefore only select substances can pass through them. Phospholipid is the most frequent type of lipid in the membrane. Two layers make up the phospholipids' outer and inner surfaces.
What function does a membrane ?As a result, the cell membrane has two functions: first, it acts as a barrier to keep the cell's components in and undesirable materials out, and second, it acts as a gate to allow the entry of essential nutrients and the exit of waste products.
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Why does sexual dimorphism exist in so many species? give a creationist answer and an evolutionary answer.
Yes, sexual dimorphism exist in so many species.
Evolutionary reason is that Divergent traits may be adaptive for the two sexes for ecological reasons, as when males and females eat different foods. An intrinsic reason for dimorphism is that both males and females have different reproductive roles.
Creationist reason- God created us with two different sexes (Creation story) with different structures
Sexual dimorphism is the difference between the males and females in a species. The difference between males and females of the same species in size of bones and musculature and for comparison we use skull and pelvis, more if available.
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What element is essential in helping our bodies break down substances found in our food?
1. hydrogen
2. sodium
3. carbon
4. oxygen
Please anwser fast 21 POINTSSS
Answer: Oxygen
Explanation:
During cellular respiration, the cell uses oxygen to break down sugar
The element essential in helping our bodies break down substances found in our food is hydrogen. The correct option is A.
Where is the hydrogen comes from?Only six elements make up the majority of the human body: oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus.
Hydrogen is a key component in aiding our bodies in dissolving chemicals contained in meals.
Water, enzymes, and acids that aid in the breakdown of food molecules into smaller, easier-to-digest components that can be absorbed by our cells are just a few of the vital substances in our bodies that contain hydrogen as a fundamental ingredient.
Other significant physiological processes that utilize hydrogen include the creation of ATP, the body's principal source of energy, and pH balance maintenance.
Thus, the correct option is A.
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Explain how the compartmental organization of a eukaryotic cell
contributes to its biochemical functioning.
Answer: Reactants and enzymes can be concentrated in one area instead of throughout the cell.
Explanation:
How do mass extinction events influence subsequent species composition and diversity?.
Mass extinction events influence subsequent species composition and diversity by reducing competition among surviving organisms.
What caused the most extinction-level change?Around 252 million years ago, the end of the Permian epoch was marked by the greatest extinction in Earth's history. Our world was home to a variety of flora and creatures long before the emergence of dinosaurs, most of which were wiped off by a series of enormous volcanic eruptions in Siberia.How is humanity contributing to the next extinction event?According to the report, this mass extinction is different from others because human activity—changes in land use, temperature, pollution, hunting, fishing, and poaching—is the sole reason. Both on land and in the oceans, the absence of these powerful predators has had an impact.
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1. How does the endosymbiotic theory support the claim that life today could have
originated from a single cell?
On the first graph, which label is on the x-axis?
A. Glucose
B. Meals
C. Blood Glucose
D. Time
Answer: I'm pretty sure its c
Explanation:
• Which of the following statements regarding the energy produced during cellular
respiration is most accurate?
b. The energy must be transferred across the cell membrane to be used.
C.
The energy produced must tle stored in specialized organelles within the cell.
The amount of energy produced is greater than the amount of energy required.
Answer:
I think it is b because when energy is produced, it is taken to cells. hope is Right
In your own words, explain what an ecological relationship is
The evolution of which animal characteristics are probably most closely tied to the evolution of many animals with bilateral symmetry?.
The nervous system and head in animal are probably most closely tied to the evolution of many animals with bilateral symmetry.
How does bilateral symmetry work?The three axes in bilateral symmetry are the same as in by radial symmetry, however there is only one set of symmetrical sides in bilateral symmetry, the lateral sides, as the other two sides, known as the dorsal (back) and ventral (belly) surfaces, are dissimilar.
Insects, fish, amphibians, reptiles, birds, and mammals all have bilateral symmetry.
Nervous System: What Is It?The component of an animal's body known as the nervous system is responsible for controlling behavior and sending messages throughout the body. The peripheral nervous system (PNS) and central nervous system (CNS) are its two major components in vertebrates (PNS). The spinal cord and brain are both parts of the CNS.
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Give THREE reasons that might have influenced authorities in the Department to use a higher percentage of Nguni cattle breeds
Three reasons to use higher percentage of Nguni cattle breeds-
Parasite ResistantThey are heat and light tolerant.High reproduction rateNguni cattle can withstand both extremes of heat and cold since they are light and heat tolerant. They have good resistance to internal and external parasites as well as built-in immunity to diseases transmitted by ticks. They are versatile and robust. Cows will produce 10 or more calves because of their early maturity, fertility, ease of calving, and longevity. The cows wean calves who weigh 45–50% of their body mass with remarkable efficiency. Calves grow at a rate of about 0.70 kg per day until weaning, when their average birth weight is 22.5 kg and they wean at a weight of about 175 kg.
Due to their low birth mass, small uterus, and sloping rumps, Nguni cattle are less prone to dystocia.
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What is another explanation for how bacteria could be showing up on the stomach biopsy slides?
The bacteria could be showing up on the stomach biopsy slides.
First the tissue sample is removed during the experiment called upper endoscopy. The whole experiment was done with a flexible tube and with a small camera at the end.The scope is inserted down the throat into the stomach.bacteria is a single celled organisms (unicellular) that are prokaryotes.Archaebacteria and Eubacteria comes under kingdom of bacteria Archaebacteria are ancient bacteria, lives in extreme environments (hot springs, very salty environments, can live without oxygen, some found in intestines of animals)Eubacteria Can be found nearly everywhere, live on and in your body. Some are autotrophs that help add oxygen to the atmosphere.To know more about bacteria visit : https://brainly.com/question/8008968
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A pear tree was saved from the site, rehabilitated and eventually returned to the site of the memorial. What is the tree called?.
A pear tree was saved from the site, rehabilitated and eventually returned to the site of the memorial is called the survivors tree.
What distinguishes the Survivor Tree?The Survivor Tree, an American elm tree located in the center of Oklahoma City, witnessed one of the biggest terrorist assaults on American soil and withstood the bomb's devastation. The tree was crucial before the bombing since it was the only source of shade in the downtown parking lot.
After enduring the September 11, terror attacks at the world. A severely damaged tree was discovered at ground zero.
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The advertisement must include the mineral’s name, chemical formula,
and a cartoon slogan that describes one or more of its important uses.
Cn you pleasee give some example to thissss
Thank uuuuu
You must also include pictures or a cartoon character that relates to your slogan. Advertisements must be neat and colorful.
Advertising and marketing is a advertising and marketing communication that employs an brazenly backed, non-private message to sell or sell a product, provider or idea. Sponsors of advertising are normally companies wishing to sell their products or services.
Advertising and marketing is a means of communique with the customers of a products or services. Commercials are messages paid for with the aid of people who ship them and are meant to tell or impact those who receive them, as described by the marketing association of the United Kingdom.
An advertisement refers to a paid shape of verbal exchange that promotes a service, product or logo. Entrepreneurs use advertisements to help companies reach their targets and boom revenue. Frequently, they layout advertisements for specific businesses of potential clients.
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Work in the cell or in the physical world can only be done with expenditure of ; it is defined as the capacity to do work.
Answer:
IT'S "ENERGY"Explanation:
Correct me if I'm wrong :)
In mammals, why is aneuploidy of the x chromosome more often viable than aneuploidy of the autosomes?
In mammals, is aneuploidy of the x chromosome more often viable than aneuploidy of the autosomes is only one X chromosome remains fully functional in mammalian cells.
Many or all genes on additional X chromosomes are silenced early during development.
Aneuploidy is the condition in which the chromosomes and the number of it are missing that is either one chromosome can be missed or more than one which can lead to abnormalities in the body and malfunctioning in the expression of characters and can also lead to any chromosome number that is not the exact multiple of haploid number which in humans is 23 and its paired form has 46 chromosomes so whenever there is a loss in one chromosomes or addition of one chromosome it can lead to different syndromes like down syndrome, knilfeltners syndrome, turners syndrome and many more and it can be the main cause of miscarriages during pregnancy as well and in mammals aneuploidy of x chromosome is more viable because only one X chromosome remains fully functional in mammalian cells.
Many or all genes on additional X chromosomes are silenced early during development. In females there are two x chromosomes so even the other is silenced the other one is functional and in the same way in males the x chromosomes remains functional that is why aneuploidy affects are seen on x chromosomes.
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Found throughout the nervous system, __________ aid and support the function of neurons. a. neurotransmitters b. somas c. glia d. reuptakes please select the best answer from the choices provided a b c d
Answer:
C: glia
Explanation:
I got it right on edge
Functions of neurons supported by glial cells, which provide support and also help increase action potential, hence option c is correct.
What are glial cells?Neurons are the basic functional units of the nervous system, and they create electrical impulses referred to as action potentials, which allow them to transmit data swiftly over large distances.
Glia is also essential for nervous system function, although they primarily serve to support neurons. Despite the complex nature of the nervous system, the nervous system consists of only two main types of nerve cells: neurons and glial cells.
Glial cells clearly provide "support" both for cells such as neurons and structures such as blood vessels, they can also function to increase action potential conduction.
Therefore glia provides support to the function of neurons and helps to generate an action potential, hence option c is correct.
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HELP ASP ILL GIVE BRAINILEST TO WHOEVER IS RIGHT AND 17 points
Bohr model and electron cloud model describes the position of electrons in an atom. Bohr model was given by Niels Bohr and electron cloud model was given by Erwin Schrödinger.
What are the similarities and dissimilarities between Bohr Model and Electron Cloud Model?Similarities: The basic idea of movement of electrons in a specific path is common in both the models without emitting energy.
Both the models shows that electrons have energy which depends upon quantum numbers.
Dissimilarities: The Bohr Model describes the particle-nature of electron while the electron cloud model describes the wave-nature of electron.
Bohr model tells about the specific path of an electron whereas the electron cloud model tells about the regions where the probability of finding an electron is highest.
Thus, the models explains about the stability of an atom with respect to the energy of an electron.
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The tissue that always has a free surface exposed to the internal or external environment is:________
The tissue that always has a free surface exposed to the internal or external environment is epithelia.
A group of cells that perform similar functions and have a similar structure can be referred to as a tissue. Tissues are of four types- epithelial, connective, muscle, and nervous tissue. Epithelial tissue acts as a protective sheath, connective tissue joins other tissues and keeps them in place, muscle tissues help in voluntary and involuntary movements, and nerve tissues carry signals to and from various parts of the body. Epithelial tissue are remain exposed to the internal or external environment as they protect the interior of the tissues from the damage caused by such environments.
The epithelium is an animal tissue that covers the surface of organs, blood vessels, and cavities of the internal organs. It covers the body surfaces that are exposed to the external environment and lines the body cavities exposed to the internal environment.
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