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
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The skin and oral cavity may have anaerobic microenvironments
Indicate whether this statement is true or false.
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
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
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