When rapid speciation produces a cluster of closely related species that occupy different habitats or consume different
foods, the process is referred to as ____.
a. punctuated equilibrium
b. disjunct dispersal
c. disjunct vicariance
d. adaptive radiation
e. continuous vicariance
ANSWER: d
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Of the following organisms, which one is among the Aggregatibacter aphrophilus, Aggregati-bacter actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella spp. (HACEK) group of organisms that cause slowly progressive bacterial endocarditis?
a. Capnocytophaga gingivalis b. Sphingomonas paucimobilis c. E. corrodens d. A. actinomycetemcomitans
The structure enabling depolarization to travel deep into the muscle fiber is the ________.
A. motor unit B. T tubule C. sarcomere D. sarcoplasmic reticulum
In hominid evolution, which came first?
A. larger arms B. bipedalism C. bigger feet D. large brains
Which of the following is true about genes that are located on different chromosomes?
a. These genes are inherited independently of each other. b. Only the dominant alleles of these genes tend to be inherited together. c. These genes are always inherited together. d. These genes are more likely to undergo mutation. e. I don't know the answer.