A scientist measured heritability in yield per acre of a strain of wheat grown on a farm in Eastern Europe and determined that it was 80%. She can therefore conclude that:
A. 80% of variation among individuals when
the same strain of wheat is grown in
Nebraska will be due to genetic differences.
B. 80% of variation among individuals when
the same strain of wheat is grown on the
same farm the following year will be due to
genetic differences.
C. when the same strain of wheat is grown on
two different farms at the same time, 80% of
the average difference in yield per acre will
be due to genetic differences among
populations.
D. All of these choices are correct.
E. None of these choices is correct.
E
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The thin horizontal arrows in the figure above show that the _____
A) warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well B) warmer venous blood transfers heat to the cooler arterial blood C) warmer arterial blood transfers heat to the cooler venous blood D) arterial blood is always cooler in the abdomen, compared to the temperature of the venous blood in the feet of the goose E) goose's legs get progressively warmer as the blood moves away from the abdomen towards the feet
When bacteria appear in tissues, a type of large cell engulfs and destroys them. Which process are these cells using to engulf the bacteria?
A) exocytosis B) active transport C) pinocytosis D) phagocytosis
An animal lives in an environment where there are few predators, but the population is very dense. They likely have a life-history that is
A. r-selected, meaning there is rapid exponential increase in population growth B. K-selected, meaning that the species will likely be well-adapted to crowded conditions C. r-selected, meaning that the ability of individuals to compete with others is favored D. K-selected, meaning high fecundity is favored
Which of the following is characterized by weakness, fatigue, decreased blood pressure, blurred vision and pale clammy skin?
What will be an ideal response?