Which of the following definitions best describes an evolutionary arms race?
a. Prey adapts to selection pressure exerted by a predator.
b. Prey responds to predation by evolving defensive weapons (e.g., antlers or sharp hooves).
c. Prey responds to selection pressure from a predator who in turn responds to the selection pressure exerted by the prey's counter-adaptation.
d. Prey responds to selection pressure from a predator by improving its defensive weapons (e.g., antlers or sharp hooves) who in turn responds to the selection pressure exerted by the prey's defensive weapons by better offensive weapons (e.g., longer teeth).
C
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Which molecule is responsible for separating double-stranded DNA into single strands?
A. DNA primase. B. DNA helicase. C. topoisomerase. D. DNA ligase. E. single-stranded binding proteins.
__________ results from a mutation to a gene on the X chromosome that will eventually lead
to muscle fibers to break down.
Fill in the blank(s) with the appropriate word(s).In an organism with 16 chromosomes per cell, how many DNA molecules are present in a cell undergoing anaphase of mitosis?
A) 8 B) 16 C) 24 D) 32 E) 64
A giant specimen of the multinucleate slime mold Physarum polycephalum had a surface area greater than 5.5 m2 but was only 1.1 mm in thickness. This is most likely what type of slime mold?
What will be an ideal response?