Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.
- Telomeres are repetitive sections at the very ends of chromosomes that are present in a variety of eukaryotic species, including humans and unicellular protists.
- Each round of DNA replication wears down a little portion of the telomeres, which serve as caps to safeguard the interior chromosomal regions.
- Most somatic (body) cells do not typically have telomerase activity, but certain adult stem cells and germ cells—the cells that produce sperm and eggs—have.
- Adult germ cells, tumor cells, and fetal tissues all contain telomerase. Telomerase activity is controlled during development and is extremely low in somatic (body) cells, virtually undetectable. These somatic cells age because they do not frequently use telomerase.
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Answer:
having traits that help a single organism survive
Answer:
The most appropriate answer would be D. The western skink population would be separated into two groups, and genetic diversity would decline in each group.
It can be explained with the help of a bottleneck effect due to which population size decreases suddenly due to events like a natural disaster, habitat destruction et cetera.
The construction of the multi-lane highway would have destroyed the natural habitat of western skinks and separate them into two populations.
The separation of a population along with the destruction of habitat would result in a severe decrease in the population size of western skinks.
Consequently, the genetic diversity would also decrease.
Adenine pairs with thymine. They form complementary pairs withone another during replication of the parent strand, forming the complement strand. If thymine is present for 30% of the bases, then its complement, adenine, will also be present in 30% of the bases.
Answer:
The answer is primates, rodents/rabbits, crocodiles and birds.
Explanation:
Cladogram
A cladogram is a diagrammatic epresentation of the evolutionary relationships between organisms that emerged from the same ancestor. Basically, it shows how closely one organism is related to another.
A cladogram differs with a phylogenetic tree in the sense that a cladogram only shows evolutionary relationships between one ancestor and all its descendants. On the other hand, a phylogenetic tree explains relationships between many clades (group of related species)
A cladogram also identifies various evolutionary points or milestones of the development of certain characteristics.
According to this cladogram, the amniotic egg evolved before the emergence of the common ancestor of primates, rodents, crocodiles and birds.
