Water is a major limiting factor in which of the following biomes?

A) tundra
B) savannah
C) tropical rainforest
D) coral reef
E) temperate grasslands


Ans: A) tundra

Biology & Microbiology

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Which of the following structural features of epithelial tissues are related to the function of these cells? Epithelial cells _____

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Biology & Microbiology

Why is the operon arrangement of genes beneficial to certain bacteria?

A. It allows for the differential regulation of individual genes that encode proteins with a common function. B. It allows the coordinated regulation of a group of genes that encode proteins with a common function. C. It allows the separate regulation of individual genes that encode proteins with different functions. D. It allows the coordinated regulation of a group of genes that encode proteins with different functions. E. It allows for coordinated regulation of a group of proteins involved in numerous cellular activities.

Biology & Microbiology

The ________ rate refers to the total number of individuals infected at any one time regardless of when the disease began.

A. morbidity B. mortality C. index D. prevalence

Biology & Microbiology

Which of the following statements best describes the rationale for applying the principle of parsimony in constructing phylogenetic trees?

A) Parsimony allows the researcher to "root" the tree. B) Similarity due to common ancestry should be more common than similarity due to convergent evolution. C) The molecular clock validates the principle of parsimony. D) The outgroup roots the tree, allowing the principle of parsimony to be applied.

Biology & Microbiology