Which of the following would be examples of homologous structures?
1.The wing of a bee and the wing of a bird.
2.The leg of a grasshopper and the leg of a kangaroo.
3.The wing of a bird and the flipper of a whale.
4.All animal limbs are homologous.3
3
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A gene pool is
A. the genes that are unique to a species. B. all the genes in a population. C. all the similar genes in a gene family. D. a swimming hole for geneticists. E. a group of species that look alike but are not located in the same area at the same time.
Circular DNA molecules found in nature are
A) positively supercoiled. B) negatively supercoiled. C) not supercoiled, due to their small size. D) always oriented in a triple helix to conserve space. E) always in the Z-DNA formation.
The most common pioneer species are mosses and lichens
Indicate whether the statement is true or false
Which of the following correctly describe the color of different cells after using the Gram staining technique?
> Gram-negative - Purple > Gram-negative - Pink/red > Gram-positive - Purple > Gram-positive - Pink/red