Gas exchange, which is necessary for photosynthesis, can occur most easily in which leaf tissue?
a. epidermis
b. palisade mesophyll
c. spongy mesophyll
d. vascular tissue
e. bundle sheath
Ans: c. spongy mesophyll
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Which of the following is least likely to be considered a mutualistic relationship?
a. Bacteria living in the roots of pea plants b. Bird nesting in a tree. c. Cyanobacteria living inside of an eukaryotic cell. d. Clownfish living in the tentacles of an anemone. e. Fungi living in the roots of plants.
When individuals choose mates are a particular
trait they desire it is called
a. stabilizing selection. b. sexual selection. c. artificial selection. d. Red Queen selection. e. disruptive selection.
Speciation is more likely to occur if the isolated population is large
_______ Indicate whether the statement is true or false.
Hookworms and threadworms usually enter the body by penetrating into the skin.
Answer the following statement true (T) or false (F)