A(n) ____________________ molecule is at the center of each heme group in hemoglobin. Fill in the blank(s) with the appropriate word(s)


ANSWER: iron

Biology & Microbiology

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What basic information does a demographer need to know to predict a species population size through

time?

What will be an ideal response?

Biology & Microbiology

Which type of active transport is illustrated here?

1.Antiport 2.H+ pumped against its gradient 3.Symport 4.Uptake of cations

Biology & Microbiology

Protection from injury, dehydration, and microbes is provided by the

a. immune system. b. skeletal system. c. integumentary system. d. endocrine system. e. lymphatic system.

Biology & Microbiology

When a farmer grows cotton containing the gene for Bt toxin, they often leave a strip of non-Bt cotton around the outside of the field for what reason? Select one:

a. to allow some rr bollworm caterpillars to survive b. to allow the non-Bt and Bt cotton plants to cross pollinate c. because the non-Bt cotton does not drive the moths and caterpillars to extinction d. because the non-Bt cotton grows better e. to allow some RR bollworm caterpillars to survive and limit selection pressure for resistance

Biology & Microbiology