Any physical or chemical agent that brings about an increase in congenital malformations is called a(n) ____
a. teratogen
b. hormone
c. ARX factor
d. cytocin
e. trophoblast
a
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Meiosis is necessary because otherwise
A) the fertilized ovum will have too much genetic material. B) the fertilized ovum will have too little genetic material. C) reproduction would have to be asexual. D) too many mutations will occur.
What is an example of an ultimate cause of animal behavior?
a. physiological b. cellular c. genetic d. anatomical e. adaptive
Why do aquatic systems seem particularly vulnerable to disruption by exotic consumers?
A) because higher temperatures result in faster population growth B) because humans typically ignore problems in aquatic systems C) because of the predominance of top-down control of community structure by consumers D) because of the low productivity of aquatic ecosystems
When amino acids are degraded in cells, into what intermediate(s) of the aerobic respiration process are the carbon skeletons of amino acids primarily converted?
A. pyruvate and Krebs cycle intermediates B. pyruvate and acetyl-CoA C. Krebs cycle intermediates D. pyruvate E. acetyl-CoA