Which of the following evolutionary innovations played key roles in allowing life on land?
a. conjugation
b. amniotic egg
c. exoskeleton
d. B and C
e. all of the above
Answer: d. B and C
Biology & Microbiology
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The common ancestor of all animals is/are the:a
yeast. b. rotifers. c. sponges. d. bacteria. e. choanoflagellates.
Biology & Microbiology
Plants store most of their energy for later use as:
a. unsaturated fats b. saturated fats c. starch d. sucrose e. cellulose
Biology & Microbiology
Which of the following is so small, it is visible only with an electron microscope?
A) Mitochondrion B) Prokaryotic cell C) Eukaryotic cell D) DNA
Biology & Microbiology
Infection with ________ may result in peptic ulcers and stomach cancer
A) Campylobacter jejuni B) Helicobacter pylori C) Borrelia recurrentis D) Vibrio parahaemolyticus E) Rickettsia rickettsii
Biology & Microbiology