Which gland is active in the building up of the body's defense system and is larger in infants and children?
A) thyroid
B) pancreas
C) posterior pituitary
D) thymus
D
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The beneficial feature of economic development is that it is even across space
Indicate whether this statement is true or false.
Ecosystem ecology is primarily concerned with
A. ecosystem stability. B. species interactions in various types of ecosystems. C. the synthesis of nutrients. D. patterns of species diversity within ecosystems. E. movement of energy and materials through organisms and their communities.
Four children of a man and woman who are second cousins have too few teeth, which is an autosomal recessive condition called oligodontia caused by mutation in a gene called LTPB3 on chromosome 11. The affected individuals are also short, with increased bone density in the spine and skull. The protein that causes the symptoms by affecting certain bone cells is too short. The mutation in this family is most likely
A) a missense mutation. B) a nonsense mutation. C) a duplication of the gene. D) a replacement of all purines with pyrimidines.
Clownfish and sea anemones live together each benefiting the other. The clownfish protects the sea anemone from predators and the sea anemone provides food and protection for the clownfish. This relationship is called
a) commensalism b) predation c) parasitism d) mutualism