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
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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
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
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.
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