In the simplified prairie food chain illustrated by the pictures below, the letter C represents a ____
a. tertiary consumer
b. secondary consumers
c. first trophic level
d. primary consumers
e. third trophic level
ANSWER: b
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Diploid (2n) cells in the ____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores
Fill in the blank with the appropriate word.
Two groups of organisms can occupy the same exact niche
Indicate whether the statement is true or false
When our ancestors were confronted by a saber tooth tiger, the ________ nervous system was responsible for "supercharging" their escape, while the ________ nervous system returned the body systems to normal after escaping the danger
Fill in the blank(s) with correct word
Which hemoglobin genotype has the highest fitness in an area of low malaria infection?
a. HbAA b. HbAS c. HbSS d. All are equal