Answer the following questions true (T) or false (F)
1. Only eukaryotic cells depend on ATP.
2. Given enough time, sucrose can spontaneously break down into fructose and glucose in a glass of water.
3. Enzymes themselves are altered in the process of catalyzing chemical transformations.
1. FALSE
2. TRUE
3. FALSE
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Which animal phylum lacks a network of nerve cells for gathering information from the environment?
A. Porifera - sponges B. Cnidaria - jellyfish, sea anenomes C. Platyhelminthes -- flatworms D. Nematoda - roundworms E. Mollusca - octopus, squid, clams, snails, and other mollusks
DNA microarrays use enzymes to convert mRNA obtained from the cell into cDNA. This cDNA is hybridized with known DNA from specific genes isolated from the organism. If hybridization occurs, what does this mean?
A. It means the DNA has transformed into another type of DNA and the corresponding genes are present in the cell. B. It means the DNA has not transformed into another type of DNA and the corresponding genes are not present in the cell. C. It means the cDNA has bound to complementary DNA on the microarray, indicating that the corresponding gene is being expressed in the cell. D. It means the cDNA has not bound to the complementary DNA on the microarray, indicating that the corresponding gene is not being expressed in the cell.
The brain can infer the pitch of a sound from the:a
number of hair cells that are stimulated. b. particular hair cells that are stimulated. c. intensity with which the hair cells are stimulated. d. intensity of the action potential produced by the stimulated hair cells. e. fluid movements of the semicircular canals.
Which plant is the most fit?
A) a plant with deep roots B) a plant with large leaves C) a plant with large flowers D) Environmental information is required to determine fitness.