Most large crustaceans exchange gases through their exoskeletons

Indicate whether the statement is true or false


F

Biology & Microbiology

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In the 1700s, a French scientist, Antoine Lavoisier, gained new experimental information by reacting a metal and an acid. His observation of the results seemed to show that much of the metal had been lost in the chemical reaction. Upon weighing the products, the total amounts of materials had not changed during the reaction. This research resulted in the law of conservation of mass. This law also applies to biology, because the materials we are made of are that change forms, but aren't truly lost through biochemical reactions.

A. matter B. isotopes C. energy D. metals E. solutions

Biology & Microbiology

The bones in the forelimbs of a mammal

a. can often be traced to a common ancestor. b. offer no evidence to support the theory of evolution. c. perform the same function no matter which species they are in. d. may exhibit either analogy or homology but not both when compared to the forelimb of another animal. e. show convergence with some invertebrate structures.

Biology & Microbiology

If energy gain remained constant over time, the bird would maximize energy gain by staying on the tree forever.

a. true b. false

Biology & Microbiology

The genomes of some vertebrates are much smaller than those of others

For example, the genome of the pufferfish Fugu is much smaller than the human genome, and even much smaller than genomes of other fish, primarily because of the small size of its introns. A. Describe a mechanism that might drive evolution toward small introns or loss of introns and could therefore account for the evolutionary loss of introns according to the "introns early" hypothesis. B. Describe a mechanism that might drive evolution toward more or larger introns and could thereby account for the evolutionary appearance of introns according to the "introns late" hypothesis.

Biology & Microbiology