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Sonja [21]
2 years ago
7

PLEASE HELPPPPP Im almost out of time

Biology
2 answers:
Taya2010 [7]2 years ago
7 0
The moon revolves around the earth
Leviafan [203]2 years ago
3 0

Answer:

B. The moon revolves around the sun.

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Klio2033 [76]

Answer:

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2 years ago
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Describe the chemical components of DNA.
Slav-nsk [51]

DNA is composed of nucleotides, which are composed of three parts:

1. A five carbon carbohydrate (pentose)

Pentose is classified as a monosaccharide (simple carbohydrate), and its molecular formula is represented by (CH_{2} O)n. They are water soluble molecules with sweet taste. Monosaccharides may have from three carbon atoms (trioses) to six (hexoses). In DNA is present pentose (5 carbon atoms)

2. A nitrogenous base

Nitrogenous bases are ring-shaped compounds that contain nitrogen in their molecular structure. They are classified into two groups: purines and pyrimidines

The purine bases are adenine (A) and guanine (G). They are larger and contain more than one ring in their structure,.

The pyrimidines, cytosine (C), uracil (U) and thymine (T), are smaller and composed of a single ring.

3. One or more phosphate groups

A phosphate consists of a trivalent anion that contains one phosphorus atom and four oxygen atoms. Its molecular formula is expressed by (PO_{4} ^{-3}).

3 0
3 years ago
Which of the following do prokaryotes not contain?
Hoochie [10]
It has no definite nucleus but a region containing chromosome called nucleoid.
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What would happen if cellular respiration did not occur?????
Burka [1]
If cellular respiration does not occur, then the level of oxygen present in the cell will get decreased as a result cell can die due to lack of oxygen. This is because<span> cellular respiration provides the energy necessary for cellular activities. Hope this answers the question. Hope this answers the question.</span>



7 0
3 years ago
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What is Earth's natural blanket that traps heat and maintains the Earth's tempeture???
Georgia [21]
The atsmoshpere works as Earths blanket to trap in uv rays from the sun.

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