Which of the following is typically found in secondary, but NOT primary, cell walls?

a. hemicellulose
b. pectin
c. cellulose
d. lignin


Ans: d. lignin

Biology & Microbiology

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Where is ATP synthase located in non-photosynthetic eukaryotes?

a. outer membrane of the cell b. nuclear envelope c. rough endoplasmic reticulum d. matrix of the mitochondria e. inner mitochondrial membrane

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A taxon that includes all the descendants of an ancestor is called:a

paraphyletic. b. homophyletic. c. monophyletic. d. phenetic. e. polyphyletic

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Changing day length, as well as variations in precipitation and temperature, are environmental cues

that exert an important influence on: a. the kinds of genes a plant has. b. the number of mutations that genes undergo. c. whether a plant is an annual, biennial, or perennial. d. which genes will be expressed in a plant. e. whether a plant reproduces sexually or asexually.

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The process of mechanical digestion includes

A. the breakdown of food particles by enzymes. B. physically making food smaller and easier to handle. C. the churning of food in the muscular stomach. D. the hydrolysis of nutrients. E. both B and C

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