Of the over 19,000 new species described for the first time in 2009, more than half were
A) marine organisms.
B) plants.
C) insects.
D) vertebrates.
Answer: C
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A substrate is another term for a(n) ____
a. enzyme b. product c. reactant d. active site e. cofactors
Agarose is added to solidify the gel. It then acts as a filter, allowing only
What will be an ideal response?
A phosphorus shortage in soil would make it difficult for plants to produce
A. amylose B. cellulose C. DNA D. starch
Four of the following statements about lizards are true. Which statement is false?
A. Lizards are a very small component of the present-day reptiles. B. Lizards and snakes are more closely related to each other than to turtles. C. Some lizards are not predators. D. Lizards have overlapping scales on their bodies. E. All lizards have three-chambered hearts.