The human lineage began to diverge from those of other primates about:
A. 153 million years ago
B. 210 million years ago
C. 6 million years ago
D. 18 million years ago
E. 64 million years ago
C. 6 million years ago
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The special dyes used in fluorescence microscopy that absorb light at one wavelength and emit light at a different wavelength are called ________.
Fill in the blank(s) with the appropriate word(s).
The anatomical orientation or arrangement of the nervous system of a sea star
a. contains a central control organ with interconnecting neurons. b. produces a signal that intensifies as it radiates from its point of origin. c. cannot coordinate movement of the arms. d. allows the organism to respond to stimuli approaching from any direction. e. sends electrical signals in only one direction.
If a cell had four sets of chromosomes before
mitosis, how many would it have after mitosis?
a. 2 sets b. 4 sets c. 8 sets d. 0 sets e. none of these because a cell can’t have 4 sets of chromosomes
You are interested in the evolution of a particular kind of beetle. What sort of analysis might be useful in your study?
A) Look for similarities between the histone genes of other beetles and the one being studied. B) Find out what kinds of birds eat the beetles, and see what else those birds eat. C) Compare the beetles to other insects in the area. D) Find all the places where this particular kind of beetle lives.