Colchicine is a drug that is used in plant breeding to create polyploids. It blocks the assembly of microtubules. If dividing cells are treated with Colchicine, at what stage of mitosis would you predict the arrest would occur?
A. prophase
B. metaphase
C. late Anaphase
D. telophase
E. G1 of interphase
A
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It took 3 million years for the human population to reach 1 billion, 123 years to grow to 2 billion, and
12 years to grow from 6 to 7 billion.
Indicate whether the statement is true or false.Which effect of vaccination is essential for future response to viral infections?
What will be an ideal response?
The role that humans play in artificial selections to...
a. determine who lives and who dies b. create the genetic variants, which nature then selects c. choose which organism to breed, and which do not d train organisms to breed more successfully e. perform artificial insemination
A disaster such as a meltdown in a nuclear power plant requires close examination of potential impacts on organisms. Which of the following would be useful to biologists in such a situation?
A) Use a molecular clock to time the divergence of species in an area from those far away. B) Measure continental drift to determine if the disaster had accelerated movement of continents. C) Use radiometric dating to determine if new species are forming. D) Examine the mutation rate of species in the area.