What are the steps toward multicellularity, in the correct order?
A. Some cells become gametes, then a colony forms, and finally some cells start to specialize.
B. Some protists start to specialize for specific tasks, then they form a colony with specialists, and finally some specialists become gametes.
C. First a colony of protists forms, then some become gametes, and finally others specialize in various tasks.
D. First a colony of protists forms, then some protists start to specialize in specific tasks, and finally some cells become gametes.
Answer: D
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warts?
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Emotional states are the responsibility of the
a. medulla. b. corpus callosum. c. limbic system. d. cerebral cortex. e. cerebellum.
An individual with Patau syndrome would be called a triploid
Indicate whether the statement is true or false
Which of the following is evidence supporting the Lyon hypothesis of X inactivation?
A. A highly condensed structure is consistently observed in female cells, but not in normal male cells. B. Female mammals that are heterozygous for X-linked traits are phenotypic mosaics. C. A female cat that is homozygous for coat color cannot have a calico phenotype. D. Calico patterns of coat color are never exactly the same. E. All of the answers are correct.