The evolution of jaws played an important role in the evolution of fish because it allowed them to ____
a. diversfy feeding styles
b. reduce oxygen consumption
c. specialize feeding styles and reduce oxygen consumption
d. diversify feeding styles and increase oxygen consumption
e. specialize feeding styles and increase oxygen consumption
d
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This method of soil cultivation reduces soil erosion and runoff
A) swidden farming B) multi-cropping C) short fallow D) conservation tillage E) truck farming
Toxicants that cause harm by triggering overactivation of the immune system are called ___.
a. neurotoxins b. teratogens c. allergens d. antibiotics
As countries become more ____________________, their populations tend to grow more slowly
Fill in the blanks with correct word
A generally accepted, thoroughly tested explanation for a set of observations is a:
Hypothesis Scientific method Scientific Law Scientific Theory