Crop plants with added insect resistance might lead to
a. toxicity in humans.
b. development of more resistant insects.
c. toxicity in land animals.
d. toxicity in birds.
e. toxicity in fish
B
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A cell biologist examines a skin cell from a lizard during metaphase of mitosis and determines that 20 chromatids are present. The role of meiosis in this species is to (Check all that apply)
_____ Produce 4 daughter cells that are genetically different from each other. _____ Produce 4 daughter cells that are genetically different from the original parental cell. _____ Reduce the number of chromosomes per cell from 10 to 5. _____ Reduce the number of chromosomes per cell from 20 to 10. 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 know about meiosis? 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?
A high concentration of chlorophyll imbedded in the plasma membrane fold of a newly discovered species of bacteria suggests a:
A. Chemolithoautotrophic metabolism B. Chemoheterotrophic metabolism C. Photoautotrophic metabolism D. Photoheterotrophic metabolism Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about bacterial metabolism? How does it relate to the question? · 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?
A drug that blocked the Na+/K+ ATPase would have what effect on ion concentrations and the membrane potential?
a. The ion concentrations across the membrane would immediately equalize and the membrane potential would go to zero. b. Ion concentrations would slowly equalize, and over time, the membrane potential would become more negative. c. Ion concentrations would slowly equalize, and over time, the membrane potential would go toward zero. d. Ion concentrations would not change, but the membrane potential would go to zero.
What property of the phospholipid bilayer allows proteins to move laterally in the membrane?