Signaling molecules secreted by one individual that modify the behavior of others are:
a. corticosteroids
b. pheromones
c. releasing hormones
d. inhibiting hormones
e. glucocorticoids
b
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Which of the following microbes can oxidize ferrous iron while using chlorate or perchlorate as the electron acceptor?
A. Thiobacillus ferrooxidans B. Ferribacterium limneticum C. Dechlorosoma suillum D. Pseudomonas denitrificans
If tall (D) is dominant to dwarf (d), and two
homozygous varieties DD and dd are crossed, then what kind of progeny will be produced? a. all intermediate forms b. all tall c. all dwarf d. 1/2 tall, 1/2 dwarf e. 3/4 tall, 1/4 dwarf
A great adaptive radiation of mammals began about
__________ million years ago. a. 25 b. 65 c. 95 d. 125 e. 165
Which of the following statements is true?
(a) Another name for the fertilized egg cell is the zygote. (b) Diploid organisms reproduce only sexually. (c) All sexually reproducing organisms must have two copies of every chromosome. (d) Gametes have only one chromosome.