Microbial activity generates methylmercury, which is much less toxic than the mercuric ion
Indicate whether the statement is true or false.
Answer: FALSE
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What do you know about resistance to leptin? What other information is related to the question?
What will be an ideal response?
The hormone erythropoietin causes _____
a. increased heart rate c. red blood cell formation b. deeper breathing d. all of these
Which is an example of secondary succession?
A) Beach grasses colonize a newly formed sand dune. B) Retreating glaciers leave alluvial soils for cottonwood trees to colonize. C) A shift in river flow introduces sediment to a rocky area. D) A farmer allows an agricultural field to return to native grassland.
The defensive mechanisms that target specific pathogens are called ____________ defenses. These responses involve the white blood cells called ____________ .
Fill in the blank(s) with the appropriate word(s).