____ are short sections of underground stem encased by overlapping layers of thickened, modified leaves called scales.
A. Stolons
B. Rhizomes
C. Bulbs
D. Corms
E. Tubers
Answer: C
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Biochemical systems within the stigma of a flowering plant prevent the pollen from a different species from developing a pollen tube and fertilizing its eggs. This is an example of what kind of reproductive isolation?
A. pre-zygotic, behavioral isolation B. pre-zygotic, temporal separation C. pre-zygotic, lock and key D. post-zygotic, temporal separation E. post-zygotic, ecological separation
After the second meiotic division, the number of chromosomes in each daughter cell is ________ that of the original parental cell.
A) half B) double C) the same as D) quadruple
An experimental setup is shown below. Which hypothesis would most likely be tested using this setup?
A) Light is needed for the process of reproduction.
B) Glucose is not synthesized by plants in the dark.
C) Protein synthesis takes place in leaves.
D) Plants need fertilizers for proper growth.
What is an example of a seed dispersed by water?
a. sunflower b. acorn c. coconut d. peach e. jack fruit