Answer:
(a) and (d) are correct
Explanation:
AIDS is a disease that's usually transmitted by sexual contact and breast feeding.
The RNA world hypothesis states that the earlier life-forms had relied only on RNA (Ribonucleic Acid) for the purpose of catalyzing the chemical reactions, and storing the genetic information. This hypothesis was proposed by Leslie Orgel, Carl Woese, and Francis Crick.
This hypothesis states that long before the living forms evolved to use DNA as the genetic storage material, the RNA molecules served the purpose of both storing the genetic information and carrying out catalysis, but because of its instability, DNA evolved.
Hence, the answer is RNA world hypothesis.
Answer:
D/4
Explanation:
Hom-zygous recessive is both genes are recessive/tt
Hom-zygous dominate is both genes are dominate/TT
Heterozygous is 1 gene is dominate the other is recessive/Tt
Water-soluble vitamin excesses are swiftly eliminated in urine and infrequently build up to hazardous amounts.
What is water-soluble vitamins ?
The B vitamins — folate, thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B6, and vitamin B12 — and vitamin C are the nine water-soluble vitamins. A clinical condition caused by a deficiency in one or more of these water-soluble vitamins can have serious morbidity and death effects.
The fat-soluble vitamins are used by your body as needed, and any extra is stored in your tissues and organs. The risk of vitamin poisoning increases when you take too much fat-soluble vitamins on a regular basis, making them more dangerous than water-soluble vitamins.
To learn more about vitamin poisoning click on the link below:
brainly.com/question/9445187
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Answer:
An adaptive enzyme or inducible enzyme is an enzyme that is expressed only under conditions in which it is clear of adaptive value, as opposed to a constitutive enzyme which is produced all the time. The Inducible enzyme is used for the breaking-down of things in the cell.
