The radioactive isotope ________ has a half-life of 5,730 years, and has an effective dating range of 100 to 100,000 years
Fill in the blank(s) with correct word
Carbon-14
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Formation of ____________________ is an intermediate stage in the development of colon cancer
Fill in the blank(s) with correct word
Stomata are opened when ____ guard cells and they become ____
a. active transport pumps H+ into; turgid b. active transport of H+ stops in; flaccid c. active transport pumps H+ out of; turgid
d. active transport pumps H+ into; flaccid e. active transport of H+ stops in; turgid
Cold is preferred for storing food because it retards microbial growth by slowing down metabolic processes.
Answer the following statement true (T) or false (F)
What is a characteristic shared by the protozoa which are intestinal parasites of humans?
A. They have a dormant cyst stage. B. They have multiple nuclei. C. They reproduce sexually in an invertebrate host. D. They reproduce sexually in humans. E. They have suckers for adhering to the intestine.