Cold receptors are free nerve endings while Merkel disks are the receptors for warmth.
Answer the following statement true (T) or false (F)
False
Both cold and warmth receptors are free nerve endings, but the two types have no known structural differences.
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It is believed that the coelacanths and lungfish represent a crucial link between other fishes and tetrapods. What is the major feature in these fish in support of this hypothesis?
A) Like amphibians, they are tied to the water for reproduction. B) Their fins have skeletal and muscular structures similar to amphibian limbs. C) They have highly evolved nervous and circulatory systems. D) They have lungs and are able to breathe air when water is scarce. E) They enter a hibernative stage when food is scarce, as many tetrapods do.
Which phylum harbors the MOST functional diversity observed and also has the MOST cultured representatives?
A) Actinobacteria B) Bacteroidetes C) Firmicutes D) Proteobacteria
Why are short tandem repeats (STRs) used in DNA fingerprinting?
A) Some individuals have them and some don't. B) They are the only human genes that can be cut by restriction enzymes. C) It is unlikely two unrelated people will have an identical number of repeats at the same location in their genomes. D) They are exactly the same in all individuals.
If the sequence for one strand of DNA is 3?-TCGATT-5? then its complementary strand would have a sequence of 3?-AGCTAA-5?.
Answer the following statement true (T) or false (F)