Rocky Mountain juniper (Juniperus scopulorum) and one-seeded juniper (J. monosperma) have overlapping ranges. Pollen grains (which contain sperm cells) from one species are unable to germinate and make pollen tubes on female ovules (which contain egg cells) of the other species. These two juniper species are kept separate by _____.
A) habitat isolation
B) temporal isolation
C) gametic isolation
D) behavioral isolation
E) isolation
Answer: C
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A mutation is present in the family shown in the pedigree above that alters the function of a growth factor. Which of the following could be true?
What will be an ideal response?
Chromosomes inside the nucleus do not overlap with each other because
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The transgenic mouse models for amyotrophic lateral sclerosis (ALS) and Huntington disease show symptoms similar to those seen in humans affected by these conditions
a. True b. False Indicate whether the statement is true or false
Which of the following genera is an anaerobic gram-negative rod?
A) Escherichia B) Staphylococcus C) Bacteroides D) Treponema E) Neisseria