Accessory pigments of _____ allow them to carry out photosynthesis at greater depths than other algae
a. euglenoids c. brown algae
b. green algae d. red algae
D
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Why are the predator and prey growth curves out of phase? a. Because both predator and prey are responding to changes in the previousgeneration of the other population
b. Because neither population can respond instantly to changes in the otherpopulation. c. Because reproductive cycles in either population cause a delay in response tothe other population. d. All of the above.
Egg activation by sperm entry is associated with a sudden increase in protein synthesis. What must be true of these proteins?
A. They are histone proteins. B. They are small peptides. C. They are from maternal mRNAs. D. They are from paternal mRNAs.
Acid-fast cells such as Mycobacterium lose the color of the primary stain in the presence of hydrochloric acid
Indicate whether the statement is true or false
Your friend has just returned from a deep-sea mission and claims to have found a new single-celled life-form. He believes this new life-form may not have descended from the common ancestor that all types of life on Earth share
You are convinced that he must be wrong, and you manage to extract DNA from the cells he has discovered. He says that the mere presence of DNA is not enough to prove the point: his cells might have adopted DNA as a useful molecule quite independently of all other known life-forms. What could you do to provide additional evidence to support your argument?