Harmful chemicals produced by fungi are
A. pathogens.
B. mycotoxins.
C. benthic.
D. mycorrhiza.
B. mycotoxins.
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Which of the following reflects a primary difference between transmission and scanning electron microscopy?
A. Transmission electron microscopy has high resolution, but scanning electron microscopy does not. B. Transmission electron microscopy shows contrast, but scanning electron microscopy does not. C. Transmission electron microscopy has much higher magnification than scanning electron microscopy. D. Transmission electron microscopy shows two-dimensional ultrastructure, while the scanning electron microscopy shows three-dimensional structure. E. Transmission electron microscopy uses light as an illumination source, while scanning electron microscopy uses electron beams as an illumination source.
Why is the developmental sequence relatively similar across the animal kingdom?
a. Because most animals reproduce sexually b. Because most animals exhibit bilateral symmetry c. Because most animals have an internal body cavity d. Because most animals are considered coelomates
How many centimeters long is a human fetus at the end of the first trimester?
1.3 cm 2.5 cm 3.10 cm 4.15 cm
A disease that is usually present at a low level in a certain geographic area is said to be
A. Ubiquitous B. Pandemic C. Epidemic D. Non-communicable E. Endemic