Invertebrates on land use __________ or
__________ systems for gas exchange. Fill in the blank(s) with the appropriate word(s).
Answer: book lungs; tracheal
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If a population is in Hardy–Weinberg equilibrium and p 5 .6,
(a) q 5 .5. (b) q 5 .4. (c) q 5 .3. (d) q 5 .16.
In the process of molecular cloning, which of the following cuts DNA double strands so that they have sticky ends?
a. restriction enzyme b. recombinant protein c. plasmid d. codon
The first flowering plants, true mammals, and true frogs appeared during the _____ period.
A. Cambrian B. Jurassic C. Cretaceous D. Triassic E. Permian
Which of the following is not an example of exponential growth?
a. a savings account that earns 2.5% interest each year for 10 years b. the economy of a country that grows by 2% each year for 15 years c. a child who saves one dollar each week for 10 years d. bacteria that double their cell numbers every 30 minutes e. a J- shaped curve