The first plants evolved from an organism similar to today's
A. ferns.
B. fungi.
C. brown algae.
D. green algae.
Ans: D. green algae.
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List the four major characteristics of chordates.
What will be an ideal response?
If one homogenizes liver cells, separates the membranes from the cytoplasm, and then adds epinephrine to only the cytoplasmic portion,
A) cAMP will be produced. B) G-proteins will be activated. C) adenylyl cyclase will be activated. D) calcium ions will be released. E) none of the above
Years before Schwann’s pronouncement that a cell
has a life of its own even as a component of a multicellular organism, the cell nucleus had been discovered by a. Robert Hooke. b. Robert Brown. c. Theodor Schwann. d. Rudolf Virchow. e. Anton van Leeuwenhoek.
An example of commercial harvest is the introduction of a foreign species into an area where it is not native. Indicate whether the statement is true or false