During embryonic development the ovaries
A. produce oocytes.
B. produce estrogen.
C. release eggs.
D. produce progesterone.
A. produce oocytes.
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A genomic ________ is a sufficiently large collection of recombinant DNA molecules in which the inserted sequences together represent the entire genome of an organism.
Fill in the blank(s) with the appropriate word(s).
Miller and Urey's experiment was ground breaking because
A. This was the first example of an experiment being used that inserted oxygen into the prebiotic soup. B. This was the first attempt to apply scientific experimentation to the quest of understanding the origin of life. C. They hypothesized what could have been the first molecules formed, but they could not demonstrate this in a scientific experiment. D. This was the last experiment that used boiling water as a trigger mechanism for the production of macromolecules. E. This was the first experiment based on the theory that organic carbon actually arrived from outer space.
Sensory receptors:a
produce internal environmental stimuli. b. convert stimulus energy to electrical energy. c. maintain a constantly hyperpolarized plasma membrane. d. produce a small amount of energy on a continual basis. e. produce action potentials of varying amplitudes in response to stimuli of differing intensities.
These are obligate intracellular parasites that lack mitochondria.
a. Apicomplexa b. ciliates c. dinoflagellates d. Microsporidia