Why did internal fertilization likely evolve?
A. To increase the chances of successful fertilization.
B. As a response to copulation.
C. Because there were no safe places to lay eggs.
D. As an adaptation to life in a terrestrial environment.
D. As an adaptation to life in a terrestrial environment.
You might also like to view...
Prokaryotes that harvest both energy and carbon atoms from organic molecules are called
A. photoautotrophs. B. chemolithoautotrophs. C. photoheterotrophs. D. chemoheterotrophs. E. nitrogen fixers.
Which of the following plant cells has a companion cell?
a. tracheids b. vessel elements c. sieve elements d. sclereids e. fibers
Ginkgo trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Ginkgo trees in China must behave the same way. These statements are an example of:
A. inductive reasoning B. a theory C. an experiment D. deductive reasoning
Synthetic nucleic acids are useful as
A. DNA probes. B. primers for PCR. C. antisense RNAs. D. DNA probes and antisense RNAs. E. DNA probes, primers, and antisense RNAs.