Two species of frogs belonging to the same genus occasionally mate, but the embryos stop developing after a day and then die. These two frog species separate by _____
A) reduced hybrid viability
B) hybrid breakdown
C) reduced hybrid fertility
D) gametic isolation
A
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Long filaments containing microtubules and used for cellular locomotion are called ________, whereas short fibers containing microtubules and used for cellular locomotion are called ________.
Fill in the blank(s) with the appropriate word(s).
What description applies to accessory organs?
A) They aren't included in organ systems. B) They secrete enzymes required for digestion. C) They don't contain connective tissue. D) They assist other organs in the circulatory system.
The species name is given to a group of bacteria with similar characteristics
Indicate whether the statement is true or false
Finch beaks don't grow or shrink much once the finch reaches maturity. What is responsible for the average beak size changing from year to year?
a) Different people were measuring the beaks and there was some error made. b) The average is made up from measures of many birds. c) Experimenter bias may have resulted in the change. d) More large birds were born each year than small birds. e) Beak size remains constant and doesn't change.