The nephridial organs of flatworms are called metanephridia
____________________ Indicate whether the statement is true or false.
F, protonephridia
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Which of the following statements about insect hormones is false?
A. High levels of circulating juvenile hormone inhibit molting. B. Ecdysone is released from the prothoracic gland and stimulates molting. C. PTTH stimulates the release of ecdysone to trigger molting and metamorphosis. D. In the absence of juvenile hormone, an insect will metamorphose into the adult form. E. None of the answer options is false.
A pollen grain “knows” when to germinate due to
which of the following? a. differentiation upon contact with the flower b. exposure to moisture c. cell signaling pathways d. electromagnetic impulses from the flower e. none of these
The real power of DNA fingerprinting comes from simultaneously determining the alleles an individual carries at how many STR locations?
a) 3 b) 2 c) 23 d) 20 e) 13
Some of the organic molecules on early Earth came from outer space
Indicate whether the statement is true or false