____ is a polysaccharide that is found in plant cell walls and accounts for their strength.
a. Enzyme
b. Cellulose
c. Starch
d. Cytoplasm
e. Peroxisome
b. Cellulose
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Symbionts such as Aeromonas veronii of leeches and Buchnera symbionts of insects are transmitted ________ to ensure the safe transfer of the symbiont to the next host generation
A) vertically to offspring B) horizontally through infected water C) horizontally through infected secondary hosts D) vertically through the air
You observe that chimps use sticks to collect termites for food. Which of the following would indicate this the use of the stick is a learned behavior?
A. The chimp is the only member of his or her population that exhibits this behavior. B. The chimp prefers eating termites to other types of insects. C. Food is abundant in the chimp's environment. D. Chimpanzees raised in isolation do not use sticks.
As a result of __________, large dogs such as Great Danes do not normally mate with small dogs such
as Poodles. a. temporal isolation b. mechanical isolation c. gametic isolation d. sexual isolation e. postzygotic barriers
What basic features of transcription is NOT shared by both prokaryotes and eukaryotes?
A. Gene transcription involves initiation, elongation, and termination in both prokaryotes and eukaryotes. B. The initiation of transcription in both prokaryotes and eukaryotes involves the interactions of more than one protein. C. RNA polymerase transcribes genes in both prokaryotes and eukaryotes. D. The complexity of protein components involved in transcription is similar for both prokaryotes and eukaryotes. E. Both prokaryotic and eukaryotic genes have a promoter site.