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.

Which of the five common ancestors, labeled V—Z, has given rise to the greatest number of species, both extant and extinct?

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#Question id: 7004

#Unit 5. Developmental Biology

Between fertilization and the first cleavage division, actin filaments pull the cytoplasm of the frog egg toward the point of sperm entry in a process called:

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#Question id: 7494

#General Aptitude

A clock is set right at 8 a.m. The clock gains 10 minutes in 24 hours will be the true time when the clock indicates 1 p.m. on the following day?

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#Question id: 3594

#Unit 8. Inheritance Biology

following different cross allowed and their respective phenotype.

Character	Male genotype	Female genotype	Progeny phenotype
M	Aa	Aa	3:1
N	Aa	aa	1:1
O	Aa	AA	1:1
P	Aa	AA	1

Which of the following observation conclude correct mode of dominance?

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#Question id: 1268

#Unit 4. Cell Communication and Cell Signaling

The collagen triple-helix domain

a. is rich in glycine.                             b. is rich in proline.

c. is rich in hydroxyproline.                d. is an alpha helix.

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#Question id: 16493

#Unit 12. Applied Biology

35S promoter sequences derived from cauliflower mosaic virus shows which type of expression.