Which of the following animals has a heart with two chambers: one atrium and one ventricle?
a. bird
b. mammal
c. frog
d. fish
d
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Which of the following is a characteristic of Histoplasma capsulatum?
A. It grows in moist soil, rich in nitrogen from bird and bat droppings. B. It is a protozoan. C. It grows in dry, arid soil. D. It is a dermatophyte.
How many nucleotides in the human genome
sequence change every decade?
a. 40 b. 50 c. 60 d. 70 e. 80
The production of random evolutionary changes in small breeding populations is
1.gene flow. 2.genetic drift. 3.founder effect. 4.mutations. 5.migration.
Transient local changes in the resting potential of a cell are called graded potentials because they can vary in size
In a phenomenon known as ________, many incoming signals produce progressively larger graded potentials in a cell — larger than any single impulse would produce alone. Fill in the blank(s) with correct word