Which of the following groups feeds primarily on material filtered from the water?

a) sponges
b) cephalopods
c) nematodes
d) gastropods
e) annelids


Ans: a) sponges

Biology & Microbiology

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The skin and oral cavity may have anaerobic microenvironments

Indicate whether this statement is true or false.

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According to the intermediate disturbance hypothesis, species richness is greatest in communities that experience

____.

a. rare moderate disturbances b. high temperatures c. frequent severe disturbances d. frequent moderate disturbances e. rare intense disturbances

Biology & Microbiology

Which of the following gymnosperms have pollen tubes with motile sperm?

a. cycads b. ginkgoes c. conifers d. both a and b e. a, b, and c

Biology & Microbiology

Living organisms are categorized into two major groups based on the presence or absence of a nucleus. What group is defined by the presence of a nucleus?

A) prokaryotic organism B) virus C) bacterium D) mitochondrial organism E) eukaryotic organism

Biology & Microbiology