At the beginning of prophase i, there are __________ molecules of dna in a developing human sperm cell.

Which of the following is not a result of air pollution?

ella [17]

C is your answer :)
And also C and D are true but its C.
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5 0

4 years ago

Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype.

ICE Princess25 [194]

Oh no! Something went wrong while adding your answer. It's too short. Write at least 20 characters to explain it well.Hope I help

7 0

3 years ago

Do plants use oxygen to make glucose?

In-s [12.5K]

No,because During photosynthesis green plants manufacture the sugar molecules fructose and glucose. Green plants use energy from sunlight to build sugar molecules from carbon dioxide and water. Oxygen is produced when the plant combines the carbon dioxide and the water by using the Sun's energy.

6 0

3 years ago

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Which of the following is most similar in structure to ATP?

Elanso [62]

<h2>The correct answer is : C) an RNA nucleotide.</h2>

Explanation:

Nucleic acids, DNA or deoxyribonucleic acid and RNA or Ribonucleic acid are the biological macro-molecules formed by the polymerization of monomeric units called Deoxy-ribonuclotide and Ribonucleotide respectively.
Each nucleotide or deoxy-ribonucleotide is comprised of:

A pentose sugar, deoxyribose for DNA and ribose for RNA. The Ribose has a hydroxyl group at the 2' carbon position of the sugar molecule. This hydroxyl group is replaced by hydrogen in the deoxyribose sugar.
A nitrogenous base, like adenine, guanine, cytosine and thymine (for DNA) and uracil (for RNA) linked to the 1' carbon of the deoxyribose or ribose sugar through glycosidic linkage.
One phosphate group which forms a phosphodiester bond in between the 3' carbon of one sugar molecule with the 5' carbon of the next sugar molecule in the nucleic acid polymer.

An ATP molecule contain:

Ribose as the pentose sugar but not deoxyribose.
The nitrogenous base here is Adenine.
Three phosphate groups, alpha, beta and gamma, linked to each other by two phospho-anhydride bonds and to the ribose sugar by one phosphate-ester bond.

The ATP molecule loses two of its phosphate groups, the beta phosphate and the gamma phosphate, and forms a phosphodiester bond between the 3' carbon of one ribose sugar molecule and the 5' carbon of the next ribose sugar molecule in the Ribonucleic acid polymer.

7 0

3 years ago

How can you determine that a star is about to turn into a red giant?

andreyandreev [35.5K]

Answer:

When the inner core shrinks and the outer atmosphere expands thereby giving red color to the star.

Explanation:

When the hydrogen with in the core of a star gets exhausted, the nuclear reactions taking place in the inner core move outwards towards the atmosphere of the star in search of fuel. Due to this, the star expands and become cool and red. This process continues till the star convert into red giant and all the available fuel (hydrogen) is consumed.

Due to expanding atmosphere, the inner core starts shrinking due to gravity. The pressure and temperature also increases in the middle till nuclear fission starts again but this time it will use helium instead of hydrogen.

6 0

3 years ago

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