The negatively charged component of the atom is the
A. proton.
B. nucleus.
C. neutron.
D. electron.
D
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If one of the n+1 gametes pictured on the previous slide developed into a sperm cell and fertilized a normal egg, which of the following is a possible outcome?
1.A triploid infant with three copies of each chromosome.
2.A mosaic tetraploid infant.
3.An infant with trisomy 8, 13, 18 or 21.
4.An autosomal monosomic infant boy.
Foreign materials are filtered out of the lymphatic fluid by what type of cell located within the lymph nodes?
A) platelets B) leukocytes C) macrophages D) mast cells E) erythrocytes
The Reciprocal Trade Agreement Act of 1934
a. increased the level of tariffs in the United States. b. was the first in a series of retaliatory trade acts passed by Congress. c. was the first in a series of Congressional acts reducing tariffs. d. increased the level of tariffs in the United States AND was the first in a series of retaliatory trade acts passed by Congress.
What results when the surfactant in the lungs is affected by smoking?
A) increased respiratory surface area B) decreased gas exchange in the alveoli C) reduced ability of hemoglobin to carry oxygen D) increased concentrations of carbon monoxide