To adjust blood pressure independently in the capillaries of the gas-exchange surface and in the capillaries of the general body circulation, an organism would need a(n) _____
A) open circulatory system
B) hemocoel
C) two-chambered heart
D) four-chambered heart
D
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What will be an ideal response?
What would be the karyotypic designation of a female with trisomy for the X chromosome?
____________________ Fill in the blank(s) with the appropriate word(s).
Trace the flow of a water molecule that is used during photosynthesis
A) stoma ? xylem ? root hair ? mycorrhiza B) soil ? root hair ? xylem ? stoma ? atmosphere C) soil ? root hair ? xylem ? leaf cell D) soil ? xylem ? leaf cell ? atmosphere
Scientists believe that a major factor promoting the adaptive radiation of mammals was probably
a. their development of fur b. the mass extinctions of most dinosaurs, an event that opened up new ecological niches c. internal fertilization d. their tetrapods body plans, which gave mammals new capabilities e. the origin and diversification of flowering plants