A type of isolating mechanism that leads to reproductive isolation after a hybrid zygote has formed is called a(n) ________ isolating mechanism.
A. prezygotic
B. adaptive
C. differential
D. hybridization
E. postzygotic
Answer: E
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Aquaporins are
a. channel proteins for water. b. carrier proteins for solutes. c. channel proteins for solutes. d. carrier proteins for water. e. carrier proteins for water and solutes.
If the downward slope of the line continues, what would be the expected sea ice volume in 2020?
A. 15.5 millions of square kilometers B. Less than 13 millions of square kilometers C. A little over 14.5 millions of square kilometers D. A little over 13.5 millions of square kilometers
All organisms are mostly the same in
a. how their proteins catalyze chemical reactions b. the size of their genes c. the proteins they make on their ribosomes d. the molecular biology of their genes
Scientists are attempting to make a chicken look like a dinosaur ("dino-chicken") by using drugs or proteins to turn on certain homeotic genes in somatic cells during the development of a chicken embryo. If the scientists are successful in creating both
male and female "dino-chickens," and then the "dino-chickens" mate, what type of offspring would the two "dino-chickens" have? A) a male or female "dino-chicken" B) a male or female normal chicken C) You can't know for sure because of random fertilization. D) You can't know for sure because it depends on whether the modified homeotic genes are dominant or recessive.