Hey there! Your answer to this question..
What is the reproductive system of reptiles?
Reptiles are almost all sexually dimorphic, and exhibit internal fertilization through the cloaca. The reproductive system of reptiles has four functions:
To produce egg and sperm cells.
To transport and sustain these cells.
To nurture the developing offspring.
To produce hormones.
Answer:
It allows flexibility (adjustment) and survival of a population in the face of changing environmental circumstances.
Explanation:
Hey
This answer to your answer is DNA because the genetic code is the set of rules that explains how the information is transferred from DNA to the proteins. Thus, it is carried by DNA molecule in most organisms.
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completed question'
.....culturing viruses that requires a human host
Answer:
Diploid cell culture lines, developed from human embryos, are widely used for culturing viruses that require a human host
Explanation
Viruses can not thrive in a non-living host or artificial media.They are intracelular parasites which needed living host to replicate . Cultures lines from Human embryo in are therefore used for culturing viruses of human host, so that its mode of replication and gene expression can be studied, and therefore its virulence can easily be studied.
This method have the advantage that;
1.there is no need to make use of the whole animal rather,on a tiny tissue needed can be isolated for culture.
2. the cells growth is continuous,and can be preserved in liquid Nitrogen and renew for future culture
3. cells can be grown in different containers, with ability to decide the number of cells needed.
Temperature is kept at optimum for human in the culture at 37 degree centigrade, nutrients are provided, NaHC03 as buffers for C02, and the medium is humidified.