Obligate symbiotic fungi that form associations with plants by entering the cortical cells of plants without invading the plant cell's membrane are called ________ and include the genus ________
A) ectomycorrhizae / Agaricus
B) ectomycorrhizae / Glomus
C) endomycorrhizae / Agaricus
D) endomycorrhizae / Glomus
Answer: D
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Researchers surgically fuse two of the three ossicles in the inner ear of a mouse, effectively leaving two functional, linked ossicles in place of three. When the mouse's hearing is tested, what outcome would be expected? The mouse would be _____
A) more sensitive to sound, but only in the low-frequency range B) more sensitive to sound, but only in the high-frequency range C) more sensitive to sound in general D) less sensitive to sound in general
The secondary cell wall is always located outside the primary cell wall
____________________ Indicate whether the statement is true or false.
Describe what occurs during prophase of mitosis.
What will be an ideal response?
Based on experiments with amphibian embryos, Spemann and Mangold found that
A) transplanted cells always died. B) transplanted cells completely undifferentiated into random masses of tissue. C) transplanted cells always formed a whole new embryo. D) in most cases, transplanted donor cells assumed the developmental fate of the area to which they were transplanted in the host. E) donor cells maintained their original differentiation no matter where in the host they were transplanted.