An allele on the X chromosome is responsible for the recessive trait of red-green color blindness in humans. The daughter of a woman who is color-blind has normal vision and marries a man who is color-blind. This couple has a son, what is the probability that the son will be color-blind?
(A) 0
(B) 1/4
(C) 1/2
(D) 3/4
Answer: (C) 1/2
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Answer the following statements true (T) or false (F)
1. Freshwater fishes are hypoosmotic. 2. Habituation is a type of learning. 3. Migration only occurs in vertebrates. 4. The main advantage of a territory is that it provides exclusive access to some resource. 5. Only invertebrates show true eusociality.
Were guppies present in every pond?
a. yes b. no
Endophyte translates to "inside plant" and refers to which of the following?
A. fungi that live inside of plants and help protect plants from disease-causing organisms B. fungi that live inside of plants and produce oxygen for the plant C. bacteria that live inside of plants and produce carbon dioxide for the plant D. bacteria that live inside of plants and help protect plants from disease-causing organisms E. protozoans that live within plant cells and kill invading microorganisms
The prevention of genetic exchange between two species because they reproduce at different times of
the day or year is called:a. hybrid sterility. b. genetic isolation. c. sexual isolation. d. mechanical isolation. e. temporal isolation