The amphibian heart consists of two atria and two ventricle(s)
____________________ Indicate whether the statement is true or false.
F, one
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Water may be lost in the form of liquid from the surface of leaves through a process known as
A. guttation. B. cohesion. C. phloem loading. D. mesophyll adhesion. E. aeration.
Trypan blue is
a. taken up by living cells. b. taken up by dead cells. c. taken up by both living and dead cells. d. used to identify plant cells.
Using the data in Figure 53-3, the cause of the decline of the wolf population in 1982 was:a
a sharp decrease in food supply. b. a decrease in the intrinsic rate of increase for the wolf population. c. competition with a newly introduced predator. d. introduction of a disease organism. e. cannot be determined from the data provided.
Marsupial animals complete development in
A. a placenta. B. water. C. an egg. D. a pouch.