Practice Questions

TLS Online TPP Program

#Question id: 4640

During drought years on the Galapagos, small, easily eaten seeds become rare, leaving mostly large, hard-cased seeds that only birds with large beaks can eat. If a drought persists for several years, what should one expect to result from natural selection?

#Unit 11. Evolution and Behavior

Small birds gaining larger beaks by exercising their mouth parts.
Small birds mutating their beak genes with the result that later-generation offspring have larger beaks.
Small birds anticipating the long drought and eating more to gain weight and, consequently, growing larger beaks.
More small-beaked birds dying than larger-beaked birds. The offspring produced in subsequent generations have a higher percentage of birds with large beaks.

More Questions

TLS Online TPP Program

#Question id: 14490

#Unit 13. Methods in Biology

In a single throw of two dice find the probability that neither a doublet (same number on the both dice) nor a total of 9 will appear.

TLS Online TPP Program

#Question id: 12018

#Unit 10. Ecological Principles

The amount of energy entering a food chain depends on the

TLS Online TPP Program

#Question id: 12675

#Unit 10. Ecological Principles

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions

What would be a likely entry for box A?

TLS Online TPP Program

#Question id: 8850

#Unit 9. Diversity of Life Forms

Whatever its ultimate cause(s), the Cambrian explosion is a prime example of

TLS Online TPP Program

#Question id: 24253

#Unit 2. Cellular Organization

Choose the correct option

a. H3 and H4 histones first form heterodimers that then come together to form a tetramer with two molecules each of H3 and H4.

b. While H2A and H2B form heterodimers in solution but not tetramers.

c. This assembly without DNA called Histone-only Intermediates

d. First the H3.H4 assemble into tetramer (HOI) then DNA wrapped over H3.H4 tetramer.