The class of echinoderms that releases tubules or eviscerates internal organs is called:
a. Holothuroidea.
b. Asteroidea.
c. Ophiuroidea.
d. Echinoidea.
e. Crinoidea.
A
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Traits that are similar in two species as a result of common ancestry are referred to as:
A. homologous. B. analogous. C. convergent. D. derived. E. ancestral.
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
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
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