Blood leaving the right ventricle enters the ____________________ circulation. Fill in the blank(s) with the appropriate word(s)
ANSWER: pulmonary
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The evolution of development of snout-length in cichlid fish is best explained by
A. a single gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
In Duchenne muscular dystrophy, which
protein is directly affected?
a. myosin b. actin c. dystrophin d. myoglobin e. hemoglobin
Answer the following statements true (T) or false (F)
1.ADP is required for muscular contraction. 2.Calcium ions are required for muscular contraction. 3.The biceps and triceps work as an antagonist muscle pair. 4.Without its endoskeleton, the vertebrate body would be without support. 5.One of the critical functions of the vertebrate skeleton is helping to generate movement with the muscular system.
The leaves of a plant are the main organs where photosynthesis occurs. Which of the following best describes how their structure is related to this function?
A) Most leaves contain all the structures that the plant requires to reproduce. B) Leaves are covered by a waxy cuticle that prevents water loss. C) The leaves are covered with tiny hairs that allow for more water absorption. D) Most leaves are broad and flat to absorb maximum sunlight.