Choanocytes are a characteristic of members of the phylum Cnidaria

____________________ Indicate whether the statement is true or false.


False - Porifera

Biology & Microbiology

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In some forms of breast cancer, estrogen is a(n)

A) initiator. B) promoter. C) progressor. D) inhibitor. E) mutagen.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology