BIOLOGY HIGH SCHOOL

Which TWO phrases describe the contents of a chromosome? A. A single gene
B. Many genes
C. Many DNA molecules
D. A single DNA molecule

Answers

Answer 1

Answer:

Answer:

D&B

Explanation:

Each chromosome contains a single double-stranded piece of DNA

one chromosome contains thousands of genes

Answer 2

Answer:

D and B

Explanation:

Related Questions

In which sentence is the underlined word the proper adjective formed from Africa?A. The African elephant is the largest land mammal. B. The Africa elephant is the largest land mammal. C. The Africa's elephant is the largest land mammal.
In an ocean ecosystem, which is necessary to begin a food web
Which example best demonstrates the neoclassical style used in poetry during the age of reason?A. If ever two were one, then surely we. If ever man were loved by wife, then thee; If ever wife was happy in a man, Compare with me ye women if you can. B. Arise, my soul, on wings enraptur'd, rise To praise the monarch of the earth and skies, Whose goodness and beneficence appear As round its centre moves the rolling year, Or when the morning glows with rosy charms, Or the sun slumbers in the ocean's arms: Of light divine be a rich portion lent To guide my soul, and favour my intent. C. We smile, but, O great Christ, our cries To thee from tortured souls arise. We sing, but oh the clay is vile Beneath our feet, and long the mile; But let the world dream otherwise, We wear the mask! D. I caught a tremendous fish and held him beside the boat half out of water, with my hook fast in a corner of his mouth. He didn't fight. He hadn't fought at all. He hung a grunting weight, battered and venerable and homely. Here and there his brown skin hung in strips
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Do Aztecs have llamas?

A secure food supply depends on all of the following EXCEPT?Choose one answer.
a. maintaing healthy soil and water
b. increased use of fertilizer
c. safe distribution of food
d. biodiversity

Answers

Let's look at the options

a. maintaining healthy soil and water

This seems like an obvious option, since healthy soil is necessary to produce food. If a soil is not healthy, it will not have enough nutrients to produce plants.
b. increased use of fertilizer

Actually, the use of fertilizer is not necessary, as healthy soil will be enough to produce food. And increasing the use of fertilizer is even more not good, because it can be unhealthy and it can lead to the soil being infertile.

c. safe distribution of food

This is also very important. Imagine if you can produce healthy food, but you cannot deliver it safely to people and the food gets infected with bacteria on the way - then the whole effort is in vain!
d. biodiversity

This is actually very important, because if you have only one species, if this species is hit by a plague, you could loose all your crop! So you need to keep a variety of crops

Enzyme molecules react with reactants to produce substrates. True False

Answers

In general, yes it is true that Enzyme molecules react with reactants to produce substrates, but it should be noted that this is not always necessarily the case.

Answer:

true

Explanation:

not "always" but the majority of the time

What is the relationship between the zooxanthellae and the hard coral, the remora and the manta ray, the tiger shark and the green sea turtle, and the dolphin and the school of trevallies and state why you chose that relationship. The relationships will be predation, competition, commensalism, or mutualism.

Answers

The Zooxantelae and the hard coral are in a mutualistic relationship. This means that both the hard coral and the algae benefit from this relationship. The coral gets extra nutrients produced by the photosynthesizing algae, and the algae gets protection and a stable environment by living inside the coral tissue.

The case of the remora and the manta ray is a perfect example of commensalism. In this type of relationship, one of the participants has benefits, and the other participant has no benefits, nor costs. The remora gets ''leftovers'' from the manta ray, and possible protection from larger predators and the manta ray does not benefit from this relationship.

The tiger shark prays on the green sea turtle, so this is a clear example of predation.

The trevallies and the dolphins are both apex predators, therefore they are competing against each other for pray.

Zooxanthellae and the hard coral-Zooxanthellae are the symbiotic algae that live within the hard or stony corals. The symbiotic relation is based on the coral's inability to generate sufficient amounts of food and the algae’s ability for photosynthesis and converting chemical elements into energy. - mutualism

The remora and the manta ray-The benefits to the remoras and remora for living in such close association with their larger hosts are clear, but there is a debate about whether the manta rays receive a significant return in benefits from these relationships. - mutualism

The tiger shark and the green sea turtle - the turtle is eaten by the shark-predation

The dolphin and the school of trevallies-To feed, dolphins use a fast, surprise attack, and, unlike the hunting packs of trevallies, dolphins can successfully hunt alone. - predation

I hope that this is the answer that you were looking for and it has helped you.

Proteins are composed of which of these subunits? Select one: a. amino acids b. glucose molecules c. fatty acids d. nucleotides

Answers

Subunits of Major Macromolecule Groups:
Lipid - Fatty Acid
Protein - Amino Acid
Nucleic Acid - Nucleotide
Carbohydrate - Polysaccharides (including glucose)

Proteins are composed of amino acids. Glucose molecules make up sugars and starches. Fatty acids make up, big surprise, fat molecules (unsaturated having double bonds between carbon atoms). Nucleotides make up DNA and RNA.

Explain the structure and function of DNA.

Answers

DNA is the information molecule. It stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes. These chromosomes are made up of thousands of shorter segments of DNA, called genes.

Answer:

"the art of teaching is the art of assisting discovery"

Explanation:

Need HELPOf the items listed, what is something that could be used to help tell the history of an area?

rock layers

animal habitats

human settlements

plant life