What is generally true of two sibling species?
a. They are the result of anagenesis.
b. They are unable to produce hybrid offspring upon interbreeding.
c. Their reproductive isolation from each other is complete.
d. Genes are unable to pass from one sibling species' gene pool to the other's.
e. They shared a common ancestor recently in evolutionary time.
Answer: e. They shared a common ancestor recently in evolutionary time.
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a. Internal fertilization occurs. b. External fertilization occurs. c. These animals have an amniotic egg. d. both (a) and (c)
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Root hair development is under the control of two genes that code for transcription factors
____________________
During telophase, ________
A) the events of prophase are reversed B) chromosomes line up in the middle of the cell C) sister chromatids become separate chromosomes D) the nuclear envelope breaks up