Which group includes all of the other groups?
a. domain
b. order
c. family
d. genus
e. species
A
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In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young and the old. What conclusion is best supported by this data?
A. A program should be established to cull the sheep population. B. Wolf predation is not dramatically reducing the sheep population. C. The wolf population is at its carrying capacity, so it is no threat to the sheep population. D. A program should be established to cull the wolf population. E. Dall mountain sheep in Denali are an r-selected population.
Blood found at crime scenes is commonly used as a source of DNA. Which component of blood provides the DNA?
1.red blood cells 2.white blood cells 3.plasma 4.all of the choices
Which of the following pigments enables red algae to utilize the dim light that penetrates ocean surface water as a source of energy?
A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene
Restriction endonucleases are especially useful if they generate "sticky" ends. What makes an end sticky?
A) blunt ends B) 5' cap C) single-stranded complementary tails D) 3' cap E) poly-A sequences