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BigorU [14]
3 years ago
14

Evaluate how the contributions made by Goodall, Chory, and Drew reinforce our understanding of the characteristics of life

Biology
1 answer:
katen-ka-za [31]3 years ago
5 0
They were able to show how to produce the best plant with the right amount of light that the plant is exposed to.

They were also able to show how to draw blood plasma  from the blood by studying its response to various stimuli.
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Vacuoles store materials in a cell.
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What test can determine if a person has hiv or tell how much a virus is present in the blood
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Yes, tests like urine and blood tests.

Explanation:

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After Brian loses his third job in a year, his wife tells him that she wants a divorce. Brian becomes deeply discouraged, demons
solmaris [256]

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depression

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3 0
3 years ago
Boris Magasanik collected data on the proportion of each base in RNA from different species. To compare the relative amount of e
just olya [345]

Answer:

The nucleic acid is a macromolecule present in living systems in the form of either DNA or RNA, whose molecule consists of many nucleotides which are linked with each other to form long chains. The presence of DNA or RNA in an individual promotes continuity of life. The variability and complexity of nucleic acid are dependent on its constituent molecules as, sugar, a phosphate group, and a nitrogenous base. However, two monocyclic nitrogenous bases were classified purines (adenine:A, guanine:G) and pyrimidines (thymine:T, cytosine:C, and uracil:U).

In addition, RNA is a single-stranded structure which differs from DNA in two aspects, the sugar content of RNA is ribose, and pyrimidine base uracil replaces the thymine base of DNA. A ratio between two strands of DNA can be calculated by using Chargrff's rule which states that "DNA from any cell of all organisms possess a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases'.

The purine to pyrimidine ratio in RNA with different bases is given below in the following table:

Presence of single strand in RNA does not follow chargaff's rule and alters the purine: pyrimidine ratio. The above ratio of each base in the given information is not equal, due to which the ratio of purines to pyrimidines is different. The ratio of DNA and RNA is not equal because DNA has its complementary DNA strand. However, bases in RNA might vary due to its single-strandedness property, but its ratio is dependent on the species.

Therefore, it can be concluded that the ratio of purines to pyrimidines is dependent on the species due to its genetic makeup. Hence, option (c) is correct.

7 0
2 years ago
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