The structural integrity of bacteria is to peptidoglycan as the structural integrity of plants is to _____
a. lignin
b. cellulose
c. chitin
d. sporopollenin
e. secondary compounds
Ans: b. cellulose
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Evolutionarily conserved molecules:
A. are similar in sequence among distantly related organisms. B. were likely present in the most recent common ancestor of the organisms possessing them. C. likely changed little over time because they serve a vital function. D. are similar in sequence among distantly related organisms and were likely present in their most recent common ancestor. E. are similar in sequence among distantly related organisms, were likely present in their most recent common ancestor, and have likely changed very little because they serve a vital function.
A bacterial loop entails a portion of the food web in which bacteria convert dissolved organic matter into consumable bacterial biomass
Indicate whether the statement is true or false
Maximum confidence is a procedure for reconstructing phylogenetic trees invoking the fewest number of steps or mutations
Indicate whether the statement is true or false
The sun's energy is produced by:
a. nuclear fission reactions. b. nuclear fusion reactions. c. electromagnetic radiation. d. ultraviolet radiation. e. infrared radiation