Answer:
The question is incomplete.
However, I notice that your question is mainly dealing with
"Nucleotides with a single ring structure"
I tackled that part, also providing explanation to the point you focused on.
Explanation:
Nucleotides are compounds in which nitrogenous bases (purines and pyrimidines) are conjugated to the pentose sugars (ribose or deoxyribose) and at least one phosphate group. Thus a nucleotide consists of a nitrogenous base, pentose sugar and at least one phosphate group.
Examples of the nitrogenous bases are Adenine, Guanine, Thymine, Uracil and Cytosine. Of all, Thymine, Uracil and Cytosine are with single ring, while Adenine and Guanine are double ring structure.
DNA contains roughly 100,000 pieces of viral DNA. Altogether they make up about 8 percent of the human genome.
The goal of meiosis is produce gametes, or sex cells. During meiosis, four daughter cells are produced, each of which are haploid (containing half as many chromosomes as the parent cell).
<h3><u>What are the stages of meiosis ?</u></h3>
Because meiosis involves two distinct cell divisions, a parent cell can generate four gametes (eggs in females, sperm in males). Cells move through prophase, metaphase, anaphase, and telophase with each cycle of division.
A cell must first pass through interphase before beginning meiosis I. The interphase that precedes mitosis is the same as this one. The cell develops, duplicates its chromosomes, and gets ready to divide.
To learn more about meiosis, refer to:
brainly.com/question/12859059
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Answer: A. environmental influences
A development in terms of biology is a gradual process of changes that occurs in an organism until the organism attains maturity or adulthood. Development can be physiological and mental development. Environmental influences are influences of nature on development. Some of the environmental influences are nutrition, altitude, temperature and climate. For example sunny weather conditions in a region can induce dark complexion in the habitants.
