__________ line human nasal passages. Fill in the blank(s) with the appropriate word(s)
Olfactory receptors
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Antibody-mediated responses work against _____
a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both intracellular pathogens and extracellular pathogens e. both extracellular pathogens and cancerous cells f. intracellular pathogens, extracellular pathogens, and cancerous cells
What percentage of married women worldwide
use family planning methods?
a. 20 b. 30 c. 40 d. 50 e. 60
In order to reproduce, to what type of wetland must certain species of salamanders migrate so their aquatic eggs can develop free of predatory fish that are unable to survive the annual drying up of this wetland?
A) vernal pond B) intertidal zone C) marsh D) swamp
What is one important difference between savannas and temperate grasslands?
A) Savannas only rarely experience fires. B) Temperate grasslands are mostly treeless. C) Savannas are inhabited by grazing mammals. D) Temperate grasslands have nutrient-poor soil.