Which animal has a double digestive opening?
a. coral
b. a flatworm
c. an earthworm
d. a hydra
Ans: c. an earthworm
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In island biogeography, larger islands support ______ species than smaller islands.
A. more B. fewer C. larger D. stranger E. smaller
Introducing a foreign piece of DNA into an organism in such a way that it can be passed along through the germ line (eggs and sperm) and hence to subsequent generations creates a ________ organism
Fill in the blank with correct word.
What is the most outstanding characteristic of prokaryotic cells?
a. Prokaryotes have an elaborate system of internal membranes. b. Prokaryotic cells do not have a cell wall. c. Prokaryotic cells contain energy-collecting pigments. d. Prokaryotic cells do not have a nuclear membrane. e. Prokaryotic cells possess a variety of organelles.
Saturated fats are saturated with ________
A) carbon B) nitrogen C) hydrogen D) oxygen