Bird song
a. has to be heard before a bird can sing it.
b. is learned during early life.
c. is specific for each bird species.
d. has a genetic component.
e. includes all of these.
E
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Recent discoveries of microscopic fossils have extended the known history of life to about:
A. 1 billion years ago. B. 2 billion years ago. C. 3.5 billion years ago. D. 4.5 billion years ago.
Club mosses
a. are placed in the subphylum Pterophyta. b. are so-called because of the social nature of the plants. c. do not produce gametophytes. d. are so-called because most produce strobili.
All of the following correctly describe the fate of the embryonic layers of a vertebrate EXCEPT
(A) neural tube and epidermis develop from ectoderm (B) linings of digestive organs and lungs develop from endoderm (C) notochord and kidneys develop from endoderm (D) skeletal muscles and heart develop from mesoderm (E) reproductive organs and blood vessels develop from mesoderm
The ________ of a mitochondrion is/are an adaptation that increases the surface area and enhances a mitochondrion's ability to produce ATP
A) stroma B) intermembrane space C) cristae D) matrix