Since there is a larger concentration of potassium ions inside a neuron, why is the inside of the neuron negative (-70mV) relative to the outside?
A. The negative sign is just a historical convention.
B. Potassium ions carry a negative charge.
C. The high concentration of sodium ions outside the cell makes the inside negative by comparison.
D. Negatively charged proteins inside the cell counteract the charge of the potassium ions.
Answer: D
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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?
Which of the following statements would be most INCORRECT if there were a sudden decline in plants on Earth?
A. Oxygen levels in the environment might decline. B. The rate of photosynthesis in existing plants would decline. C. There would be less organic matter on Earth. D. A decline in the population of herbivores would likely occur. E. Heterotrophic organisms would be significantly impacted.
Variations in pre-mRNA processing, such as in ____, can determine which ____ are made in cells
a. alternative splicing; proteins b. exon shuffling; proteins c. alternative splicing; transcripts d. histone modifications; transcripts e. genomic imprinting; transcripts
Convergent evolution resulted in placental and marsupial mammals with similar structural features
____________________ Indicate whether the statement is true or false.