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3 years ago

I don't understand. Can somebody help?

Biology

2 answers:

Rina8888 [55]3 years ago

5 0

Answer:

Support

Explanation:

It can’t be camouflage, or temperature it talks about both of their skeletons. It can’t be movement because it talks about the purpose, and because movement helps the fish but the outer shell for the lobster does’t really help it move.

Lemur [1.5K]3 years ago

4 0

Answer:

support

Explanation

exoskeletons provide defense and support,

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4. What is an example of positive feedback?

Shtirlitz [24]

Answer:

Explanation:

It is known as lactation. The suckling action of an infant produces prolactin, which leads to milk production; more suckling leads to more prolactin, which in turn leads to more lactation. This is a positive feedback system as the product (milk) produces more suckling and more hormone. When the child is no longer breast feeding, the prolactin drops off and milk production goes down.

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3 years ago

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two sampl

aksik [14]

Answer:

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

Explanation:

The composition of nitrogenous bases in DNA is calculated using the suggestions proposed by the results of the experiment performed by Erwin Chargaff.

He found that in a DNA sample the composition of purine to pyrimidine is 1:1. This indicates that the amount of purine equals pyrimidine. This can be presented as purines + pyrimidines= 100. Also, adenine binds thymine and cytosine binds guanine.

In the given question,

<u>For sample A </u>

A= 17.7 %, Therefore, thymine will be = 17.7 %,

A+T= 35.40%

Now, G+C=100- 35.40%

G+C= 64.60%

content of G= 64.60/2= 32.30%

content of C= 32.30%

<u>For sample B </u>

T=28.9%, A will be= 28.9%

A+T= 57.80%

G+C=100-57.80%

G+C= 42.20%

Thus content of G will be= 42.20/2=21.10

content of C= 21.10%

Thus,

For sample A, A=17.7 %, T=17.7 %, G=32.30%, C=32.30%

For sample B, A= 28.9%, T=28.9%, G= 21.10%, C= 21.10%

6 0

4 years ago

PLEASE HELP BIOLOGY!!!! (35 POINTS!)

Anna71 [15]

1. yes it is possible because some plants do not have chloroplasts like Prokaryotes. Not all plants need chloroplasts to survive

6 0

3 years ago

1)The cell theory includes all of these concepts exceptA)all cells come from the division of preexisting cells.B)each cell maint

Anna71 [15]

Answer:

They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function.

Explanation:

4 0

3 years ago

4. A soda can has a volume of 0.35 liters and before opened its internal pressure is 30 psi. What

777dan777 [17]

The volume of the gas expansion is 0.71 liters.

<h3>Boyle's law</h3>

Boyle's law states that the volume of a given mass of a gas is inversely proportional to its pressure provided that temperature remains constant.

P₁V₁ = P₂V₂

where;

P₁ = 30 psi
V₁ = 0.35 liters
P₂ = 1 atm = 14.7 psi

The volume of the gas expansion is calculated as follows;

$V_2 = \frac{P_1 V_1}{P_2} \\\\V_2 = \frac{30 \times 0.35}{14.7} \\\\V_2 = 0.71 \ Liters$

Learn more about Boyle's law here: brainly.com/question/469270

7 0

2 years ago

I don't understand. Can somebody help?​

I don't understand. Can somebody help?