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Sindrei [870]
3 years ago
15

Which system connects the lungs to the heart?

Biology
1 answer:
Brums [2.3K]3 years ago
8 0
Hello,

Here is your answer:

Your answer is the circulatory system!

The circulatory system connects the veins all around the body so the blood can be transported around the body.

Your answer is Circulatory system!

If you need anymore help just ask me!

Hope this helps!
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DNAase is an enzyme that catalyzes the hydrolysis of the covalent bonds that join nucleotides together. What would first happen
Free_Kalibri [48]

DNAase is an enzyme that catalyzes the hydrolysis of the covalent bonds that join nucleotides together. What would first happen to DNA molecules treated with DNAase?

A) The purines would be separated from the deoxyribose sugars.

B) The pyrimidines would be separated from the deoxyribose sugars.

C) All bases would be separated from the deoxyribose sugars.

D) The two strands of the double helix would separate.

E) The phosphodiester bonds between deoxyribose sugars would be broken.

Answer:

E) The phosphodiester bonds between deoxyribose sugars would be broken.

Explanation:

The purines and pyrimidines of two DNA strands of a DNA duplex are held together by hydrogen bonds. Hydrogen bonds are not covalent bonds. The enzyme DNAase targets the phosphodiester bonds. These are the covalent bonds that join two deoxyribonucleotides of a DNA strand together. therefore, when a DNA is subjected to digestion with DNAase enzyme, the phosphodiester bonds will be broken that hold the pentose sugars of two nucleotides by a phosphate group.

6 0
3 years ago
Which of the following statements are true of the cell wall?
marta [7]

The answer is B because:

Cell walls are made of cellulose and proteins (hence II).

Animal cells don't have cell walls (only cell membrane) but plant cells do so IV

They must be semipermeable since materials for example carbon dioxide and water for photosynthesis have to go into the cell <em>some</em> way.

8 0
3 years ago
In an ecosystem, energy from the Sun is transferred by way of _____.
Lorico [155]

Answer: food chains or webs

In an ecosystem, energy from the sun is transferred by the way of food chains or webs. A food chain is a linear sequence of organisms through which food and energy is passed as one organism eats the another. A food web is the interconnection or relation of food chains. In a food chain energy is distributed among the trophic levels. Plants are primary producers which traps energy from sun for photosynthesis and belong to first trophic level in the food chain. The energy of sun present in plants is transferred to subsequent higher trophic levels when plants are consumed by other organisms.


4 0
3 years ago
Read 2 more answers
Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents,
Ludmilka [50]
I would say A but im not 100% sure
6 0
3 years ago
During the _______ month the lungs can expand and contract to practice breathing techniques (even though oxygen is still supplie
Dominik [7]

Answer:

During pregnancy it is the eighth month I think. Sorry if it’s wrong.

Explanation:

4 0
3 years ago
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