Guppies preyed upon by Killifish are __
species.
a. type I
b. K-selected
c. type II
d. r-selected
e. more than one of these types of
D
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M. pneumoniae is detected as the most common agent of lower respiratory tract infection among:
a. previously healthy patients 2 months to 5 years of age. b. adults younger than 30 years of age. c. community-acquired pneumonia in adults. d. school-age children.
Sickle-cell anemia is a disease that alters the structure of hemoglobin, and in turn, can cause severe health problems in individuals if left untreated
The disease is expressed in homozygous recessive individuals, whereas the heterozygous condition usually does not result in any symptoms of the disease. Sickle-cell anemia primarily affects Africans and Caucasians of Mediterranean descent. Typically, when a disease occurs only in the homozygous recessive condition, the incidence of the gene in the population is predicted to decline overtime, particularly when it can be detected either phenotypically or by genetic testing. In East Africa, the disease still occurs in about 40% of the population. Give an explanation for why the incidence of the disease has remained so high in African populations.
Type 2 diabetes is caused by:
a. too much insulin in the blood. b. too little insulin in the blood. c. too much glucagon in the blood. d. too little glucagon in the blood. e. receptors being insensitive to insulin.
________ are lymphocytes that originate in the bone marrow but then mature in the thymus
Fill in the blank(s) with correct word