(a) Positive Phototropism
(b) Light causes lateral migration of Auxins hormones. They move or diffuse to the dark side away from the light side, causing elongation or more growth on the dark sides hence bending/ a curvature towards light.
johnmulu answered the question on May 19, 2017 at 05:40
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During a lesson, students observed the structure of bat, cat and human forelimbs to determine their evolution relationship.
(a) State the name given to the structure of the limbs observed by the students.
(b) Name the type of evolution illustrated by the structure of the limbs observed.
(c) What evidence of evolution is illustrated by the limbs?
(d) State the significance of the type of evolution illustrated by the limbs.
Date posted: May 19, 2017. Answers (1)
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(b) Why are some bacteria able to resist the effect of antibiotics?
Date posted: May 19, 2017. Answers (1)
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Date posted: May 19, 2017. Answers (1)
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State the importance of divergent evolution to organisms.
Date posted: May 19, 2017. Answers (1)
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Date posted: May 19, 2017. Answers (1)
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(b) State two limitations of fossils as an evidence of evolution. (Solved)
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Date posted: May 19, 2017. Answers (1)
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(b) Why is Lamarck's theory not acceptable? (Solved)
(a) State two ideas proposed by Lamarck in his theory of evolution.
(b) Why is Lamarck's theory not acceptable?
Date posted: May 15, 2017. Answers (1)
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(ii) Give an example of a vestigial structure in human.(Solved)
(a) (i) What is meant by vestigial structures?
(ii) Give an example of a vestigial structure in human.
Date posted: May 15, 2017. Answers (1)
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(b) How does convergent evolution occur?
(Solved)
(a) What is fossil?
(b) How does convergent evolution occur?
Date posted: May 15, 2017. Answers (1)
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(b) Give a reason why organisms become resistant to drugs. (Solved)
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Date posted: May 15, 2017. Answers (1)
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Explain continental drift as an evidence of evolution.
Date posted: May 13, 2017. Answers (1)
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(a) Organic evolution?
(b) Continental drift? (Solved)
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(b) Continental drift?
Date posted: May 13, 2017. Answers (1)
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(a) Fossils records.
(b) Comparative anatomy. (Solved)
Give reason why each of the following is important in the study of evolution:
(a) Fossils records.
(b) Comparative anatomy.
Date posted: May 13, 2017. Answers (1)
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State two advantages of natural selection to organisms.
Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)
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Give a reason why it is only mutation in genes of gametes that can influence evolution.
Date posted: May 13, 2017. Answers (1)
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State two advantages of hybrid vigour.
Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)
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Date posted: May 13, 2017. Answers (1)