Tropical forests are being cut for timber or to raise cattle and crops, which consequently is causing extinctions at a rapid rate and thus is devastating to species _____.
a. life spans
b. value to the timber industry
c. history
d. diversity
e. accountability
Ans: d. diversity
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Alternative splicing
_____ results in different proteins in the same family. _____ is important for multicellular organisms with different cell types. _____ results in proteins that can quickly be activated and deactivated. _____ is a gene regulatory mechanism in eukaryotes but not prokaryotes. _____ have pre-RNA that are the same as other genes.
Answer the question using the accompanying figure. The worker bees represented by letters E and F, which receive
the same alleles from the queen, are related to each other by ____.
a. 50% b. 75% c. 0% d. 100% e. 25%
Which group of animals has one-way flow of air through its lungs, whereas all the others have tidal flow?
A. mammals B. amphibians C. birds D. reptiles
What is meant by the statement "Enzymes are biological catalysts"?
a. Enzymes speed up the chemical reactions in living cells. b. Enzymes are products of biological systems. c. Enzymes produce biological organisms. d. Enzymes produce products useful for biology.