All of the following statements about master
genes are true EXCEPT:a.
They orchestrate layers of development.
b. They are highly conserved over
evolutionary time.
c. Mutations within these are frequently
devastating.
d. They are highly variable in their sequences
between species.
e. Mutations usually result in changes in body
plan
D
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What happens to population size (N) if there is no constraint on growth?
a. The population will quickly level out and maintain an equilibrium. b. The population will grow continuously at the same rate. c. The population will grow continuously at an ever-increasing rate. d. The population will decline.
Explain an impact of human development on the water cycle
What will be an ideal response?
Rank the following methods of acquiring oxygen from most to least efficient.
A. fish gills ? avian lungs ? mammalian lungs B. fish gills ? mammalian lungs ? avian lungs C. avian lungs ? mammalian lungs ? fish gills D. avian lungs ? fish gills ? mammalian lungs E. mammalian lungs ? fish gills ? avian lungs
What is the role of B cell receptors (BCRs) and T cell receptors (TCRs) in the immune response?
A) to release chemicals which destroy pathogens B) to recognize specific epitopes of an antigen C) to combine with haptens so they can stimulate an immune response D) to communicate with lymphocytes and other white blood cells E) to release the cytokines needs for immune cell stimulation