Several new tetraploid species of a plant called salsify (Tragopogon) have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs ________.
A. sympatric speciation; very slowly
B. sympatric speciation; almost instantaneously
C. allopatric speciation; almost instantaneously
D. allopatric speciation; very slowly
E. adaptive radiation; very slowly
Answer: B
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An airborne chemical that is used to communicate with members of the same species is called a ____
Fill in the blank with the appropriate word.
Progression through the phases of the cell cycle is regulated by fluctuating concentrations of ____
a. microtubules b. actin c. cyclins d. cyclin-dependent kinases e. histones
From the following list, choose the characteristic that favors K-selected adaptations
A. little to no parental care B. high mortality rate C. late age of first reproduction D. short life span
Regulation of the Calvin Cycle
What will be an ideal response?