Among the common features shared by prokaryotes and eukaryotes are
a. the same types of movement
b. the same shapes and sizes
c. ribosomes of the same weight
d. common organic molecules such as proteins and carbohydrates
Answer: d. common organic molecules such as proteins and carbohydrates
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Which of these is an advantage of reproduction by seed?
a. New plants can absorb nutrients from parent plants during periods of drought and disease. b. New plants can grow in biomes where water and sunlight are absent. c. New plants can grow in areas without competing with their parents for resources. d. Seeds discourage herbivores from grazing on young plants while they develop and grow.
Chordates are associated with which anatomical structure?
a. central ring canal b. metanephridia c. visceral mass d. dorsal hollow nerve cord
Langur monkeys and ruminants (such as cows) are the only known mammals in which lysozyme functions in the stomach instead of in tears and saliva. The cow/langur enzyme also has five amino acid changes that are not present in other mammals. What is most likely to be true about lysozyme from langurs and cows compared to lysozyme from other mammals?
A. These five amino acid changes alter the specificity of the enzyme, such that the cow/langur lysozyme attacks viruses instead of bacteria. B. These five amino acid changes somehow make the cow/langur lysozyme resistant to pepsin digestion. C. The five amino acids that langurs and cows have in common in their lysozyme were present in the common ancestor of all mammals. D. Salivary and tear lysozyme functions best at a higher H+ ion concentration than the cow/langur enzyme. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the convergent evolution of lysozyme? What other information is related to the question? Choose Answer · Given what you now know, what information is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The goal of eugenics is to ____
a. select the most desirable human characteristics b. eliminate genetic disorders that reach a certain threshold in terms of their costs to individuals and society c. produce genetically identical humans. d. eliminate genes for abnormal behavior. e. produce genetically perfect people.