The leaves of ferns are called ____
a. epiphytes
b. stems
c. fronds
d. bracts
e. rhizomes
ANSWER: c
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As electrons are passed down the electron transfer chain, ________ are pumped into the ________
a. hydrogen ions / outer mitochondrial compartment b. NADH molecules / extracellular space c. electrons / cytoplasm d. hydrogen ions / mitochondrial matrix
Invertebrate chordates include __________ and __________, both marine filter-feeders. Fill in the blank(s) with the appropriate word(s)
Microbes that are harmless or even beneficial on the
body’s surfaces may cause __________ if they enter the body. a. ulcers b. meningitis c. brain abscesses d. various cancers e. all of these
In mutualism, the interaction between two species is more often a reciprocal exploitation than a cooperative effort between individuals
Indicate whether the statement is true or false