In the amniote egg diagram shown, the item labeled "4" is the
a. yolk sac.
b. chorion.
c. allantois.
d. amnion.
e. albumin.
B
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A ________ is a cancer of blood cells in which the cells proliferate in the bloodstream.
Fill in the blank(s) with the appropriate word(s).
If two organisms of different species share more similar DNA sequences with each other than with other species, we can conclude that ________
A) these two species are not closely related B) these two species are very closely related C) these two species happen to share similar DNA by chance D) there is no relationship between similar DNA and how closely related organisms are
Most reabsorption occurs in the distal convoluted tubule. Indicate whether the statement is true or false
Red maples and other wind-pollinated plants invest relatively little in producing ________ but must invest a great deal in producing ________ to achieve good pollination rates
A) floral scents; showy petals B) showy or scented flowers; massive amounts of pollen C) pollen; showy or scented flowers D) seeds; massive amounts of pollen