Annelids and arthropods have a dorsal hollow nerve cord
____________________ Indicate whether the statement is true or false.
F, solid ventral
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The reduction in the density of chestnut trees in North America was due to
A. a fungal pathogen. B. chestnut blight. C. a fungal pathogen and chestnut blight. D. an insect. E. a bacteria.
If short hair (L) is dominant to long hair (l), then what fraction of the offspring produced by a cross of Ll ยด ll will be
homozygous dominant? a. 1/2 b. 1/4 c. 1/3 d. 0 e. 2/4
Introduction of a single exotic predator is most likely to disrupt ecosystem function if the introduced species is a __________ predator.
A) large B) vertebrate C) invertebrate D) keystone
What do tapeworms eat?
A) intestinal bacteria B) host tissues C) red blood cells D) intestinal contents E) plant matter