Which of the following best describes IgM antibodies?
A) They cause basophils and eosinophils to degranulate.
B) They are the most common type of antibody in the blood during the initial phases of an immune response.
C) They are the antibody class found in body secretions.
D) They interact with phagocytes and NK cells.
E) They can cross the placenta to provide passive immunity.
B
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A population of flowers is in Hardy-Weinberg equilibrium with an allele frequency for white flowers (w) of 40%. What percentage of the flowers will have the colored or dominant phenotype?
A. 16% B. 25% C. 40% D. 60% E. 84% Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Features that contributed to success on land include __________ and __________ (two types of
vascular tissues). Fill in the blank(s) with the appropriate word(s).
Plastids are found in ________ cells
A) fungal B) animal C) plant D) bacterial
A strong association learned during a sensitive period of an animal's development is referred to as
A) classical conditioning. B) insight learning. C) altruism. D) habituation. E) imprinting.