Practice Questions

TLS Online TPP Program

#Question id: 7161

What is especially exciting about research into regeneration in zebrafish?

#Unit 5. Developmental Biology

Amputation of a fin leads to regeneration of a limb, implying an evolutionary homology between the two structures.
Removal of the eye results in regeneration of the eye, and since zebrafish and humans have very similar eyes, this research may lead to new therapies for eye damage in humans.
Limited regeneration of heart muscle can occur in zebrafish, and the ability to study zebrafish genetically will enhance our ability to understand the genetic basis of regeneration.
Regeneration of the heart muscle does not occur in either humans or zebrafish, but experiments can be done on zebrafish that cannot be done on humans, opening up a model system in which to study heart regeneration for use in humans.

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TLS Online TPP Program

#Question id: 4644

#Unit 11. Evolution and Behavior

The treeʹs horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V—Z) represent various common ancestors. Letʹs say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

According to this tree, what percent of the species seem to be extant (i.e., not extinct)?

TLS Online TPP Program

#Question id: 5689

#Unit 8. Inheritance Biology

What kind of aneuploidy gamete will be generated if meiotic nondisjuction in second division (n represent haploid number of chromosome )

TLS Online TPP Program

#Question id: 24572

#Unit 10. Ecological Principles

Find out the characteristics of geometric growth?

a. It can grow for both periodic and continuous breeders

b. depends on the activity of net reproductive growth rate

c. unlimited Population Growth Leads to J-shaped