Hiking up an elevational gradient, you notice different species of birds becoming more dominant the higher you go. This could be because

A) older birds prefer lower elevations.
B) competitive abilities change along environmental gradients.
C) of population cycling.
D) there are more predators at higher elevation.


B

Biology & Microbiology

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If a pea plant strain is true-breeding for a particular trait, then:

A. crosses between two true-breeding plants with the same trait will have offspring identical to the parents. B. it will be homozygous for all genes. C. it must be a recessive trait. D. it is not useful for studying inheritance. E. it only self-fertilizes.

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Which genome editing tool is most versatile and easy to use?

A) TALEN technology B) Zinc finger nuclease technology C) CRISRP-Cas9 system D) Homologous recombination

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Where in a plant do you expect to find the highest concentration of chloroplasts?

A. leaves B. bark C. roots D. stems E. flowers

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What is the function of the human NHEJ system? What is the result of mutations of genes in this system?

What will be an ideal response?

Biology & Microbiology