The serotinous cones of the longleaf pine, Pinus palustris, depend on ________ to release their seeds.
A. sustained rainfall
B. daylight
C. fire
D. extended freezes
E. animals
Answer: C
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You are given two true-breeding groups of rabbits. The first group has floppy ears and white coat color. The second group has straight ears and black coat color
When you perform a cross of these two groups to obtain an F1 generation you see that all of your rabbits have floppy ears and grey coat color. Which of the following possibilities appears to be supported by what you see in the F1 generation? A. Straight ears are dominant over floppy ears; white coat color is dominant over black coat color. B. Straight ears are dominant over floppy ears; black coat color is dominant over white coat color. C. Straight ears are dominant over floppy ears; coat color is determined by intermediate dominance. D. Floppy ears are dominant over straight ears; white coat color is dominant over black coat color. E. Floppy ears are dominant over straight ears; black coat color is dominant over white coat color. F. Floppy ears are dominant over straight ears; coat color is determined by incomplete dominance.
Prior to Darwin's book On the Origin of Species, people thought what about species?
A. Species changed over time because they were not adapted to their environment. B. Species were designed already perfectly adapted to their environment. C. Species evolved at one point, but no longer changed because they were not adapted to their environment. D. Species changed over time as guided by a divine creator.
Which of the following best defines sympatric speciation?
a. speciation that occurs in the same location b. speciation that results from allele mutation c. speciation that occurs in analogous structures d. speciation that results from a geographic separation
One double-stranded DNA molecule combined with proteins form ____________________, which is visible as
clumps or threads in the cell nucleus. Fill in the blank(s) with the appropriate word(s).