A rootless, green plant is found growing on the branches and trunks of rainforest trees, but lacks any apparent adaptation for collecting rainwater. This plant is most likely _____
A) an epiphyte
B) a nitrogen-fixing plant
C) a carnivorous plant
D) a symbiotic plant
E) a parasite
Answer: E
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The following classes or superclasses of fish are matched with an example. Select the mismatched pair.
A. Chondrichthyes—sharks B. Placodermi—lobe-finned fish C. Myxini—hagfish D. Osteichthyes—bony fish
Which of the following genetic problems is
NOT being addressed by gene therapy?
a. Down syndrome b. cystic fibrosis c. hemophilia d. immune disorder e. cancers
Plants that are dicots have
A. two seed leaves. B. two petals. C. twins. D. a two-year growing period.
When a researcher transplanted the nucleus of an intestinal cell from a tadpole into an egg cell whose nucleus had been destroyed, the egg developed into a normal frog. This illustrates that
A) genes are gained during the process of differentiation. B) a nucleus that is removed from its normal location is influenced by adjoining cells. C) each cell of an organism has all the genes needed for development. D) the homeobox genes in a transplanted nucleus undergo mutation. E) scientists can clone a human by putting one of his or her nuclei into an egg cell.