During mutualism, one species benefits while the other is harmed.
a. true
b. false
Ans: b. false
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Although energy cannot be created or destroyed, energy transformations are not 100% efficient. Why?
a. Energy is lost as an increase in heat. b. Energy is lost as an increase in entropy. c. Energy is lost as a change in free energy. d. Energy is lost as a decrease in heat. e. Energy is lost as a decrease in entropy.
The molecule shown in the figure above is held together by ____
a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds
The ability of some tRNAs to pair with different codons is described according to ____ as being due to
imprecise base pairing with the third base in the codon.
a. alternative splicing b. degeneracy c. exon shuffling d. the wobble hypothesis e. aminoacylation
Grasslands most often are found _____
a. at 30ยบ north and south b. at high altitudes c. in interior of continents d. all of these