The common ancestor of all cells lived ________ years ago
a. 4.3 billion
b. 7.4 billion
c. 2.3 million
d. 200 million
e. 13 billion
a
Biology & Microbiology
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Ruminants digest bacterial cells as a primary source of
A) carbohydrates. B) vitamins and proteins. C) proteins. D) vitamins.
Biology & Microbiology
What is the process by which undigested food particles are expelled from a protist’s cell?
a. endocytosis b. phagocytosis c. exocytosis d. autocytosis
Biology & Microbiology
In ____, a pair of nonidentical alleles affecting the phenotypes of a given trait are both expressed at the same time in
heterozygotes. a. pleiotropy b. polygenic inheritance c. complete dominance d. codominance e. a multiple allele system
Biology & Microbiology
The ________ velocity of an enzymatic reaction is the velocity at very high substrate concentration
Fill in the blank with correct word.
Biology & Microbiology