Practice Questions

TLS Online TPP Program

#Question id: 11998

Of the following examples of ecological effect leading to an evolutionary effect, which is most correct?

#Unit 10. Ecological Principles

When seeds are not plentiful ? trees produce more seeds.
A few organisms of a larger population survive a drought ? these survivors then emigrate to less arid environments.
A few individuals with denser fur survive the coldest days of an ice age ? the reproducing survivors all have long fur.
Fish that swim the fastest in running water catch the most prey and more easily escape predation.

More Questions

#Question id: 11534

#Unit 6. System Physiology – Plant

Which of the following is the precursor of auxin?

#Question id: 11535

#Unit 6. System Physiology – Plant

During IPA pathway in the biosynthesis of auxin using following enzymes except_____

#Question id: 11536

#Unit 6. System Physiology – Plant

IAA has been found to be conjugated to both high- and low-molecular-weight compounds such as,

a) Low-molecular-weight conjugated auxins include esters of IAA with glucose or myo-inositol and amide conjugates such as IAA-N-aspartate

b) High-molecular-weight IAA conjugates include IAAglucan and IAA-glycoproteins found in cereal seeds

c) High-molecular-weight conjugated auxins include esters of IAA with glucose or myo-inositol and amide conjugates such as IAA-N-aspartate

d) Low-molecular-weight IAA conjugates include IAAglucan and IAA-glycoproteins found in cereal seeds

Which of the following is the correct prediction about low-and high-molecular weight ?

#Question id: 11590

#Unit 6. System Physiology – Plant

Seed germination may require gibberellins for one of several possible steps:

#Question id: 11591

#Unit 6. System Physiology – Plant

Gibberellins biosynthesis completes in almost three organelles

#Question id: 11592

#Unit 6. System Physiology – Plant

Gibberellin biosynthesis precursor is____