8. Which of the following types of selection favors individuals thet average (me

Question

8. Which of the following types of selection favors individuals thet average (means) in a population? A) Stabilizing selection B) Directional selection C) Disruptive selection D) None of the above vary in both directions frsm the 59. Which of the following pigments give color to Brown algae A) Phycoerythrin B) Chlorophyll a C) Phycobilin D) Fucoxanthin 60. Which of the following was proposed A) Species change over time. B) Divergent species share a common ancestor. C) Natural selection is the mechanism that produced the change. D) All of the above are correct. by Charles Darwin? Tim Birkhead and his colleagues were able to boost the immune systems of male zebra finches and increase their attractiveness to females by A) enlarging their tails. B) injecting them with hormones. C) feeding them carotenoid pigments. D) increasing their caloric intake. E) injecting them with phytohemagglutinin. I. Which of the following is a distinguishing characteristic of all angiosperms? A) Double cotyledons B) Fleshy cotyledons C) Seeds with nutrients D) Double fertilization E) Pollen production

Explanation / Answer

58. Option C is correct. Disruptive selection favours both extremes of the spectrum and actively select against the intermediate population.

59. Option D is correct. Fucoxanthin pigment is present is brown algae which is dominant over other pigments and provide brown colour to the algae. This pigment mask the effect of other pigments like chlorophyll a and b.

60. Option D is correct. Here all the statements are correct

61. Option E is correct. Phytohemagglutinin modifies the immune system in zebra and enhances the sexual attractiveness.

62. Option D is correct. Double fertlization indicates the joining of female gametes with two male gamets which is characteristic feature of angiosperm (flowering plants).

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