Practice Questions

TLS Online TPP Program

#Question id: 4585

The cow Bos primigenius (which is bred for meat and milk) has a smaller brain and larger eyes than closely related wild species of ungulates. These traits most likely arose by ________.

#Unit 11. Evolution and Behavior

natural selection, because these traits evolved in the population over time
natural selection, because these traits were not consciously selected by humans
artificial selection, because changes in these traits co-occurred with human selection for high milk output and high muscle content
artificial selection, because these animals differ from their close relatives and common ancestor

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TLS Online TPP Program

#Question id: 5291

#Unit 8. Inheritance Biology

A number of nutritional mutant strains were isolated from wild-type Neurospora that responded to the addition of certain supplements in the culture medium by growth ( + ) or lack of growth ( -). Given the following responses for single gene mutations, diagram a metabolic pathway that could exist in the wild-type strain that is most consistent with the data. Indicate where the pathway is blocked in each mutant strain.

TLS Online TPP Program

#Question id: 528

#Unit 1. Molecules and their Interaction Relevant to Biology

Once inside a cell, glucose is rapidly phosphorylated to glucose-6-phosphate. What is the main purpose of this phosphorylation?

TLS Online TPP Program

#Question id: 307

#Unit 1. Molecules and their Interaction Relevant to Biology

An ionic compound A+ B– is most likely to be formed when________

TLS Online TPP Program

#Question id: 8892

#Unit 9. Diversity of Life Forms

Which of the following correctly characterizes the phylum Rotifera?