An individual who is homozygous ______.
A. expresses the dominant trait
B. carries two different alleles for a gene
C. expresses the recessive trait
D. carries two copies of the same allele for a gene
D. carries two copies of the same allele for a gene
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A flock of flamingos wading and feeding in a lake is an example of a(n) __________
a. organism b. population c. community d. ecosystem
Which of the following was the last to appear in the fossil record?
A. pines and other gymnosperms B. all major groups of plants we see today C. mosses and other bryophytes D. ferns and other seedless vascular plants E. angiosperms (flowering plants)
The change in the developmental fates of different
cell lineages in response to signals from adjacent tissues is a. contact inhibition. b. ooplasmic localization. c. embryonic induction. d. pattern formation. e. all of these.
Describe some of the various activities performed by membrane proteins in multicellular organisms. What will be an ideal response?