A cell that has lost its capacity to grow in vitro as a monolayer is now
A) benign.
B) malignant.
C) transformed.
D) anchorage independent.
E) free ranging.
D) anchorage independent.
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Mucosal antibacterial properties, a valvelike mechanism, host immune responses, and defensins are all host defense mechanisms found in the ______ tract
a. digestive b. upper respiratory c. urinary d. genital
The prefix photo- indicates that an organism will make use of _______ for energy purposes
A. chemicals B. organics C. light D. inorganics
The hydrologic cycle is different from other nutrient cycles in that
A) the atmosphere is involved. B) water is not recycled, but flows one way through ecosystems. C) the biotic part of the cycle plays only a small role. D) the soil is not involved. E) the ocean is involved.
All of the following statements concerning activities in the female reproductive system are true EXCEPT
A. the follicles in the ovary produce estrogen. B. the placenta can produce both estrogen and progesterone. C. LH stimulates the formation of the corpus luteum. D. a surge of FSH is believed to promote ovulation. E. the corpus luteum produces progesterone.