Compact bone
What will be an ideal response?
Dense outer layer on every bone that appears smooth and solid. Also called lamellar bone, consists of osteon (Haversian system), canals, and canaliculi, interstitial and circumferential lamellae.
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What conclusions can be drawn from the studies on bent grass in a copper-polluted field and the
neighboring population in a non-polluted field?
a. Flowers in the polluted field will not survive. b. The one population now requires copper to survive. c. They have different flowering schedules, so isolation may be developing. d. They have different types of gametes, so isolation has taken place. e. They show no differences.
The function of the phloem companion cells is to
a. assist vessel members to move organic substances. b. supply potassium ions for water absorption. c. help load organic compounds into neighboring sieve tubes. d. store the organic compounds transported by the sieve tubes. e. help transport organic compounds when the sieve tubes become overloaded.
Water is an ideal solvent in cells because it
a. has low heat of vaporization. b. is a polar molecule that can form hydrogen bonds with itself and with other polar molecules. c. dissolves nonpolar molecules. d. contracts when it freezes.
Which alleles are present in each daughter cell produced by mitosis?
What will be an ideal response?