This animal has two atria and one ventricle and
two vascular circuits. This animal is
a. a frog.
b. a woodpecker.
c. an alligator.
d. a rat.
e. more than one of these.
A
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A positive tuberculin test means a patient
A) has active disease. B) has been previously exposed to Mycobacterium tuberculosis. C) has a current inappropriate infection. D) has active disease, has been previously exposed to Mycobacterium tuberculosis, or has a current inappropriate infection.
A genetic disease that causes death in infancy and has an autosomal recessive inheritance pattern can persist in a population because: Check all that apply.
_____ it can be passed on to the next generation by a heterozygous carrier. _____ if both parents are carriers, they have a 50% chance of having normal children. _____ only homozygotes for the abnormal allele will have the disease. _____ individuals with one abnormal allele do not show symptoms of the disease.
The typical osmolarity of body fluids in most freshwater invertebrates is about ____ mOsm/L
a. 5 b. 225 c. 300 d. 1000 e. 1500
Amoeboid protozoans are autotrophic
Indicate whether the statement is true or false