When a recipient cell acquires a piece of naked DNA from the environment, it is called
A. conjugation.
B. transduction.
C. transfection.
D. transformation.
Answer: D
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Which of the following statements about endosymbiosis is FALSE?
a. endosymbiosis has taken place many times among true, multicellular animals b. genes from organelles that originated through endosymbiosis are largely transferred to the host cell nucleus c. The genes that code for ribosomes in mitochondria and chloroplasts are more like those in prokaryotes than in eukaryotes d. mitochondria and chloroplasts divide on their own through binary fission e. endoysymbiosis occurred many times in unicellular animals
Mammals that lay eggs are
A. monotremes. B. birds. C. placentals. D. bats. E. marsupials.
Karyotyping is usually done using what kind of cells?
a. muscle b. blood c. cartilage d. sex e. epidermal
Which of the following choices INCORRECTLY pairs an endocrine gland or hormone with an aspect of metabolism that it regulates?
A) TSH–thyroid hormone B) pancreas–blood glucose levels C) prolactin–blood potassium levels D) ovary–female sexual characteristics