In general, the vessels that carry blood away from the heart in a closed circulatory system are referred to as
A. arteries.
B. veins.
C. capillaries.
D. sinuses.
E. auxiliary hearts.
A. arteries.
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Different ratios occur in crosses with single gene pairs or two gene pairs. What types of ratios are likely to occur in crosses dealing with a single gene pair?
A) 9:3:3:1, 1:2:1 B) 1:1:1:1, 1:4:6:4:1 C) 3:1, 1:1, 1:2:1 D) 4:1, 1:1, 1:4:1
For a complex trait that is observed less frequently in a given sex in a given family, the recurrence risk for this trait is
____________________ for future children of that sex.Fill in the blank(s) with the appropriate word(s).
Animals are ___________ because they consume other organisms
Fill in the blank(s) with the appropriate word(s).
What is often true of the fruits eaten by birds and mammals?
A. They mimic the shape of insects. B. They contain a large number of parasites. C. They are brightly colored. D. They are pale colored with strong odors.