Sterilization involves ________ all viable microorganisms.
A. removing
B. killing OR removing
C. metabolically inactivating
D. killing
Answer: B
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In a frog embryo, gastrulation
A. produces a blastocoel displaced into the animal hemisphere. B. occurs along the primitive streak in the animal hemisphere. C. is impossible because of the large amount of yolk in the egg. D. proceeds by invagination and involution as cells roll over the dorsal lip of the blastopore. E. occurs within the inner cell mass that is embedded in the large amount of yolk.
If a tree 50 meters (m) high has 30,000 leaves, the surface area of the leaves is 300 m2, and the amount of ground covered by the tree's canopy is 75 m2. The leaf area index (LAI) is
A) 4. B) 6. C) 100. D) 400.
In a healthy female, how many secondary oocytes would be expected to form from 100 primary oocytes? How many first polar bodies would be expected from 100 primary oocytes?
A) 200; 50 B) 100; 50 C) 100; 100 D) 50; 50 E) 200; 200
Medications and devices that reduce the chance of pregnancy are collectively called _________
Fill in the blank(s) with the appropriate word(s)