Which of the following is(are) true concerning

tetanus?
a. The pathogen spreads through the air.
b. The pathogen is ingested through tainted
canned food.
c. The pathogen is a virus.
d. A toxin blocks the release of GABA.
e. All of these are true.


D

Biology & Microbiology

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Molecules made primarily of carbon and hydrogen are called hydrocarbons. How many hydrogen atoms are present in each of the following molecules? A hydrocarbon chain of five carbon atoms with two double bond and two single bonds?

A. 6 B. 8 C. 10 D. 12

Biology & Microbiology

Land plants most likely evolved from which of the following organisms?

a. brown algae b. red algae c. green algae d. bryophytes e. seedless vascular plants

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When nitrate is reduced to dinitrogen gas (N2), nitrogen is removed from the ecosystem and returned to the atmosphere through a series of reactions collectively known as ________.

A. nitrogen fixation B. anammox reaction C. denitrification D. All of the choices are correct.

Biology & Microbiology

Meristic traits are characterized by having phenotypes that are described by ________

A) whole numbers B) irrational numbers C) imaginary numbers D) complex numbers E) prime numbers

Biology & Microbiology