Which habitat would be expected to have the greatest species richness?
a. an island
b. a polar habitat
c. an ecotone
d. an agricultural habitat
e. a mountain top
c
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Chemical selection occurs....
A. when a catalyst speeds up a process that would normally occur at a slower rate. B. when covalent bonds are formed between two previously unlinked molecules. C. when a chemical within a mixture has special properties or advantages that cause it to increase in number compared to other chemicals in the mixture. D. during the ribozymic phase of coacervate formation. E. after the formation of a membrane and when the DNA is replicated and transcribed.
Community ecology is best defined as the study of
A. plant distributions in a given region. B. mutual benefits between organisms at all scales in a region. C. the relationship between abiotic and biotic factors. D. how groups of species interact in the same place at the same time E. global scale influences of major disturbances such as volcanos.
How many individual bonds can a single carbon atom make?
a. 1 b. 2 c. 3 d. 4
Athletes who take synthetic steroids can become sterile due to lack of sperm production. This is because of negative feedback on which of the following?
A. the epididymis B. the testes C. the vas deferens D. the prostate E. the hypothalamus