Compact bone contains ____
a. thick concentric layers of extracellular matrix
b. spongy marrow
c. yellow marrow
d. red marrow
e. blood arteries
ANSWER: c
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In a life cycle that exhibits ____, the only diploid cell is the zygote
a. alternation of generations b. haploid-dominance c. heterotrophism d. endosymbiosis e. diploid-dominance
In some areas, rapid population growth and poverty cause the poor to
a. cut forests. b. grow crops on marginal land. c. overgraze grasslands. d. poach endangered animals. e. all of these.
Which of the following are classes of nutrients?
A) carbohydrates B) dietary cholesterol C) lipids D) proteins
If a beaver eats the bark all the way around a tree trunk (a process called "girdling"), why does the tree die?
A) Water and minerals are no longer supplied to the leaves. B) Cells of the lateral meristem can no longer divide. C) The tree cannot continue to photosynthesize. D) The tree is susceptible to insect and fungal diseases. E) The phloem is damaged, and the transport of sugars ceases.