Which substance is reabsorbed in the descending limb of the loop of Henle?
a. salts
b. water
c. glucose
d. H+
e. urea
ANSWER: b
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Seed plants are _____
a. flowering plants d. spermatophytes b. conifers e. tracheophytes c. gymnosperms
A plasmid is a
a. small segment of DNA that is often isolated from virus chromosomes for cloning purposes. b. large linear segment of DNA that is often isolated from bacterial chromosomes for cloning purposes. c. small circular segment of DNA in bacteria that is linked by hydrogen bonds to the main bacterial chromosome. d. large circular segment of DNA in bacteria that is completely separated with the chromosome. e. small circular segment of DNA in bacteria that is completely separated from the chromosome.
Which of the following is properly matched?
a. osteoblasts; bone breakdown b. osteocytes; initial bone formation c. osteoclasts; initial bone formation d. osteoclasts; bone breakdown e. osteoblasts; imprisoned in bony matrix
Ecological density is a measure of the number of individuals per unit of available living space
Indicate whether the statement is true or false