Of all the species that have ever lived on Earth, how many have gone extinct?
A. Less than 1%
B. About 10%
C. About 25%
D. About 75%
E. About 99%
Answer: E
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Choose the true statements about the genomes of plants (especially Arabidopsis and rice), animals, and fungi.
_____ Plants, animals, and fungi share most of the same genes for intermediary metabolism, genome replication, and protein synthesis. _____ "Plant" genes include those coding for photosynthetic pathways and morphology. _____ Plants generally have smaller genomes than those of animals and fungi. _____ Rice has fewer genes than humans.
When an error of mitosis or meiosis results in a diploid gamete, the gamete is said to be ____, which can result in
____.
a. reduced; allopolyploidy only b. reduced; autopolyploidy only c. unreduced; allopolyploidy only d. unreduced; autopolyploidy only e. unreduced; both allopolyploidy and autopolyploidy
Based on which of the following pieces of evidence about the transforming agent did Avery conclude that DNA is the hereditary material?
A. In an ultracentrifuge, the material migrated like DNA. B. The purified material had the same elements as DNA. C. The material was destroyed by DNA-digesting enzymes. D. The material was not destroyed by protein-digesting enzymes. E. All of the choices are correct.
Carbohydrate digestion begins in the mouth and continues on into the small intestines. Explain the steps of carbohydrate digestion, including in your discussion why salivary amylase is nonfunctional in the stomach?
What will be an ideal response?