The class of echinoderms that releases tubules or eviscerates internal organs is called:

a. Holothuroidea.
b. Asteroidea.
c. Ophiuroidea.
d. Echinoidea.
e. Crinoidea.


A

Biology & Microbiology

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The female gametophyte generation in angiosperms is found in the:a

antheridium. b. stigma and style of the pistil. c. prothallium. d. megasporophyte of the cones. e. ovule of the ovary

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The fetal period is characterized by ________

A) germ layer formation B) the formation of organ systems C) neurulation D) growth and preparation of fetal organ systems for their eventual functions

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Which of the following bacterial cell structures plays an important role in the creation of biofilms?

A) glycocalyces B) flagella C) fimbriae D) pili E) both fimbriae and glycocalyces

Biology & Microbiology