Choanocytes are a characteristic of members of the phylum Cnidaria
____________________ Indicate whether the statement is true or false.
False - Porifera
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In some forms of breast cancer, estrogen is a(n)
A) initiator. B) promoter. C) progressor. D) inhibitor. E) mutagen.
Which of the following cells are alive at maturity?
a. sieve tube members b. vessel members c. tracheids d. vessel members and tracheids e. sieve tube members and vessel members
Sam was in a terrible head-on collision. When he recovered from all of the obvious, external injuries, the once affable and happy-go-lucky person had become surly and very unfriendly. Which part of his cerebrum was most likely damaged?
A) prefrontal cortex B) Broca's area C) thalamus D) postcentral gyrus
In aquatic ecosystems, the highest nutrients levels are found in areas that have the
A) lowest light levels. B) highest elevation. C) fewest sediments. D) highest temperatures. E) highest light levels.