Which of the following were the first vertebrates to live and reproduce in dry environments?
A. fish
B. amphibians
C. birds
D. reptiles
E. mammals
D. reptiles
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The accompanying figure is a micrograph of what kind of tissue?
a. cardiac muscle b. skeletal muscle c. smooth muscle d. cartilage e. dense connective
Which of these organisms, sometimes called living
fossils, is represented by only one species? a. horsetails b. club mosses c. gnetophytes d. ginkgos e. cycads
Which aspect of population genetics refers to chance fluctuations of allele frequencies resulting from sampling error and is more prominent in small, isolated populations?
A) founder effect B) mutation C) gene flow D) gene drift E) bottleneck effect
During an infection, white blood cells travel to the infected site and phagocytize the pathogens. After phagocytosis,
primary lysosomes fuse with the phagocytic vesicle to form a larger vesicle called a secondary lysosome. The purpose for this process is to: a. Both B and D. b. degrade the bacteria and export it from the cell. c. wrap the pathogen in additional membrane, rendering them harmless. d. mix the pathogens with strong hydrolytic enzymes and destroy them. e. coat the bacteria in lipids derived from the Golgi complex, which cover and smother them.