__________ is a concentration of nerves and sensory structures at the head end. Fill in the blank(s) with the appropriate word(s)
Cephalization
Biology & Microbiology
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Which of the following is NOT true of carbon
dioxide? a. It is released in the burning of fossil fuels. b. It contributes to ozone destruction. c. It is absorbed by plants. d. It contributes to global warming. e. All of these are true
Biology & Microbiology
The human genome contains about how many genes?
a. 1,000 b. 10,000 c. 20,000 d. 100,000 e. 200,000
Biology & Microbiology
Organisms living on the sediment surface of sandy and muddy beaches are collectively referred to as ________
Fill in the blank(s) with correct word
Biology & Microbiology
Which of the following is (are) found in many veins that help direct blood flow in one direction only: toward the heart?
A) valves B) lymph nodes C) myocardium D) pericardium
Biology & Microbiology