Would one expect a linear relationship between DNA sequence divergence and phylogenetic distance? Why or why not?
What will be an ideal response?
Not necessarily, because some sections of DNA evolve more slowly if they code for products that serve important cellular functions, whereas other sections without such constraints evolve more quickly.
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A __________ is used to transfer genetic information from one organism to another
a. vector b. genetic marker c. DNA mutation d. virus
Ovaries, the female gonads, produce eggs and secrete __________ and __________. Fill in the blank(s) with the appropriate word(s)
The cones of gymnosperms play the same role as ____ in angiosperms.
A. flowers B. seeds C. leaves D. fruit E. roots
Peripheral shadows or flashes of light can be a sign that the retina is peeling away from the layer below. Why is detachment of the retina a medical emergency?
A. It is a sphincter muscle that controls light transmission. B. It is crucial for focusing the image. C. It secretes tears that bathe and protect the eyeball. D. It contains the photoreceptor cells that respond to light.