Which of the following represents an early stage in
primary succession?
a. pine trees
b. moss and lichens on bare rock
c. weedy annual plants in an open field
d. climax species in succession
e. alder, cottonwood, and willow thickets
Answer: b
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a. True b. False Indicate whether the statement is true or false
Most O2 is transported in the blood
a. dissolved in the plasma. b. as bicarbonate ions. c. bound to hemoglobin. d. as carbon dioxide. e. bound to bicarbonate ions.
A land biome is primarily defined by the dominant ________ that exist in similar climatic conditions around the world.
a. prey species b. predators c. plant species d. temperatures
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Fill in the blank(s) with correct word