Pathogenic microorganisms and their hosts live in a close association with one another known as:
A. sociality
B. mutualism
C. parasitism
D. commensalism
E. biofilms
C. parasitism
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Genes from different sources that are related in sequence due to shared evolutionary ancestry are called ________ genes, and groups of such genes are known as ________
A) homologous / gene families B) paralogous / functional genes C) orthologous / gene families D) homologous / functional genes
In a stratified lake, the warmer and less dense layer is called the
A) epilimnion. B) hypolimnion. C) hyperlimnion. D) thermocline.
Which of the following phyla is a member of the Parazoa?
a. Nemertea b. Porifera c. Rotifera d. Ctenophora e. Echinodermata
Which tissue type is a sheet-like tissue with
one surface always facing a body cavity or an external environment?
a. dense connective b. muscular c. epithelial d. nervous e. loose connective