Choose the true statement about genome size and gene number in animals.
A. Genome size differences depend to a large extent on the amount of retrotransposon DNA present.
B. The pufferfish has a larger genome than humans and more genes.
C. There is a strong correlation between the number of genes and genome size.
D. Much of the extra DNA in humans is in the form of exons.
Answer: A
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the lactic acid pathway is a type of _____________
Fill in the blank(s) with the appropriate word(s).
The copulatory organ of the earthworm is the
a. penis. b. clitellum. c. gonopodium. d. vestibule.
Tundra is divided into alpine tundra at the top of mountains and arctic tundra found close to the North Pole. These two biomes have similar plants and animals even though they can be located in vastly different regions of the world. What causes these two biomes to be similar?
Select one: a. Both are found close to coniferous forests. b. One is cold and dry because it is at a high latitude and the other is cold and dry because it is at a high altitude. c. Both are located in areas of intense sunshine. d. One grows mostly grasses because the soil is poor and the other grows mostly grasses because the soil is frozen. e. Both have large grazing herds that keep the grasses clipped short.
Which mechanism of nutrient acquisition is not seen in bacteria?
A. Group translocation B. Active transport C. Endocytosis D. Simple diffusion E. Facilitated diffusion