The skin inhibits bacterial growth by releasing
A) lysozyme.
B) macrophages.
C) T cells.
D) white blood cells.
E) lactic acid.
E
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Which of the following arose first?
a. animals b. archaea c. fungi d. protists e. plants
What step occurred first in the evolution of life?
a. formation of DNA b. formation of protein-RNA systems c. formation of membrane-bound proto-cells d. spontaneous formation of organic compounds under abiotic conditions e. formation of ATP
Pollen from a plant with the S1S2 genotype is recognized and allowed to germinate on the stigma of the same plant with the S1S2 genotype. According to the S-system hypothesis, this indicates that the plant is _____
A) self-compatible and can self-pollinate. B) self-compatible and must cross-pollinate. C) self-incompatible and can self-pollinate. D) self-incompatible and must cross-pollinate.
These large paired bones form most of the lateral and superior walls of the cranial vault (calvaria).
What will be an ideal response?