Molecules that resemble fats but contain phosphate functional groups are called
A. steroids.
B. polypeptides.
C. phospholipids.
D. nucleic acid.
C. phospholipids.
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Flowers that bloom in early spring versus those that bloom in late summer experience which type of reproductive
isolation?
a. behavioral b. ecological c. gametic d. temporal e. mechanical
Who played the most influential role in discovering protists?
a. Rudolf Virchow b. Anton van Leeuwenhoek c. Theodor Schwann d. Matthias Schleiden
In reproductive cloning, cells are subjected to an electric current under special circumstances. What effect does this have?
A) It mimics fertilization and begins embryonic development. B) It removes an udder cell from an adult. C) It introduces recombinant DNA. D) It removes DNA from an egg.
Which of the following is a correct sequence of events in the history of life on Earth?
A) prokaryotes, photosynthesis, eukaryotes, land organisms B) Cambrian explosion, multicellular organisms, photosynthesis, eukaryotes C) aquatic organisms, photosynthesis, RNA world, land organisms D) prokaryotes, eukaryotes, land animals, land plants