Triploid organisms usually result from
A) the union of monoploid and diploid gametes.
B) nondisjunction during mitosis.
C) propagation of fused cell lines.
D) a fertilization event that involves three monoploid gametes.
E) normal fertilization of gametes produced by triploid parents.
A) the union of monoploid and diploid gametes.
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The dinoflagellate Pfisteria is an important protist. Which of the following statements DOES NOT describe its attributes?
A. It causes nervous disorders in humans. B. It uses toxins to attack fish which it then consumes. C. It lies dormant on the bottom until stimulated by chemicals from fish. D. It is a major cause of food poisoning in humans. E. Its toxins damage fish skin thereby increasing exposure to the pathogen.
A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase, which functions in the metabolism of phenylalanine, with known database sequences. Which of the following should provide the closest match?
A. green pufferfish B. zebrafish C. chicken D. orangutan E. fruit fly
Humus often enhances the water and nutrient-retaining properties of topsoil. Which of the following might increase the humus content of a soil? Check all that apply.
_____ mushroom compost _____ leaf litter _____ ground limestone _____ phosphate fertilizer _____ fish meal 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 humus? 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?
Every type of mollusc has a radula
Indicate whether the statement is true or false