Angiosperms mystified Darwin because they seem to have appeared suddenly in the fossil record
Indicate whether the statement is true or false.
T
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Which of the following is true of electric synapses? Select all correct choices
A. They enable rapid communication. B. They are found in the mammalian brain. C. They release neurotransmitter molecules through exocytosis.
To study the genome of the loblolly pine, Pinus taeda, researchers obtained DNA from ____ cells, thereby halving the
amount of DNA for initial sequencing.
a. haploid b. diploid
c. triploid d. polyploid e. hexaploid
A closed circulatory system is found in the:A
Cephalopoda. B. Turbellaria. C. Bivalvia. D. Gastropoda. E. Polyplacophora
Gram-negative bacteria contain _______ which, when released into the bloodstream, cause fever, low blood pressure, and inflammation.
a. chitin b. cellulose c. peptidoglycan d. lipopolysaccaride