____ occurs when a change in chromosome number takes place in a single generation
a. Sympatric speciation
b. Disruptive selection
c. Directional selection
d. Hybrid sterility
e. Allopatric speciation
ANSWER: a
You might also like to view...
The discrepancy between the number of microbial cells observed by microscopic examination and the number of colonies that can be cultivated from the same natural sample may be due to ________.
A. nonviable organisms and incorrect culture conditions B. nonviable organisms C. incorrect culture conditions D. microbial motility
If a woman in her late forties wants to have a baby and seeks medical advice, she will be advised that she is at greater risk of having a baby with Down syndrome.
a. true b. false
The rate at which a population can increase when food and habitat are limitless is called
A. sigmoid growth. B. the biotic potential. C. logistic growth. D. population expansion.
For a particular disease at a specific time period, morbidity rates should always be equal or greater than mortality rates
Indicate whether the statement is true or false