This is the process where nature selects organisms with favourable characteristics/ traits
Well adapted to prevailing environmental conditions survive, each adulthod and reproduce giving forth off springs that inherit the favourable characteristics while those with unfavourable characteristics do not survive competition hence die young and their genes are eliminated from nature.
johnmulu answered the question on May 19, 2017 at 05:09
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State the importance of divergent evolution to organisms.
(Solved)
State the importance of divergent evolution to organisms.
Date posted:
May 19, 2017
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Explain how comparative embryology is an evidence for organic evolution.
(Solved)
Explain how comparative embryology is an evidence for organic evolution.
Date posted:
May 19, 2017
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Explain continental drift as an evidence of evolution.
(Solved)
Explain continental drift as an evidence of evolution.
Date posted:
May 13, 2017
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State two advantages of natural selection to organisms.
(Solved)
State two advantages of natural selection to organisms.
Date posted:
May 13, 2017
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State three pieces of evidence that support theory of evolution
(Solved)
State three pieces of evidence that support theory of evolution
Date posted:
May 13, 2017
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Answers (1)
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Give a reason why it is only mutation in genes of gametes that can influence evolution.
(Solved)
Give a reason why it is only mutation in genes of gametes that can influence evolution.
Date posted:
May 13, 2017
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State two advantages of hybrid vigour.
(Solved)
State two advantages of hybrid vigour.
Date posted:
May 13, 2017
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State three structural differences between DNA and RNA.
(Solved)
State three structural differences between DNA and RNA.
Date posted:
May 13, 2017
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Answers (1)
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Differentiate between phenotype and genotype as used in genetics
(Solved)
Differentiate between phenotype and genotype as used in genetics
Date posted:
May 13, 2017
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Answers (1)
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State two advantages of hybrid vigour
(Solved)
State two advantages of hybrid vigour
Date posted:
May 13, 2017
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Answers (1)
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Give an example of a sex-linked trait in humans on:
Y - CHROMOSOME.
X - CHROMOSOME.
(Solved)
Give an example of a sex-linked trait in humans on:
Y - CHROMOSOME.
X - CHROMOSOME.
Date posted:
May 13, 2017
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Answers (1)
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State two characteristics that researchers select in breeding programme.
(Solved)
State two characteristics that researchers select in breeding programme.
Date posted:
May 13, 2017
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Answers (1)
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Tallness in pea plants is due to a dominant gene. Two tall pea plants were crossed and their F 1 generation were in the ratio of 3 tall: 1 short. using letter T to represents the gene for tallness and t for shortness give the
(Solved)
Tallness in pea plants is due to a dominant gene. Two tall pea plants were crossed and their F 1 generation were in the ratio of 3 tall: 1 short. using letter T to represents the gene for tallness and t for shortness give the
(a) (i) Genotype of the parents
(ii) Gamete of the parents
(iii) Genotype ratio of the F 1 generation
(b) What is meant by the term testcross in genetic studies?
Date posted:
May 13, 2017
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Answers (1)
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Name three types of chromosomal mutations.
(Solved)
Name three types of chromosomal mutations.
Date posted:
May 13, 2017
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Answers (1)
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In a breeding experiment, plants with red flowers were crossed. They produced 123 plants with red flowers and 41 with white flowers
(Solved)
In a breeding experiment, plants with red flowers were crossed. They produced 123 plants with red flowers and 41 with white flowers
(a) Identify the recessive character. give a reason
(b) What was the genotype of the plants that gave rise to the plants with red and white flowers?
(c) If the white flowers were selfed, what would be the genotypes of their offspring?
Date posted:
May 13, 2017
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Answers (1)
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State the function of Deoxyribonucleic acid (DNA) molecule.
(Solved)
State the function of Deoxyribonucleic acid (DNA) molecule.
Date posted:
May 12, 2017
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Answers (1)
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State three factors that contribute to the deceleration phase in the population phase in the population curve of an organism.
(Solved)
State three factors that contribute to the deceleration phase in the population phase in the population curve of an organism.
Date posted:
May 12, 2017
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Answers (1)
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What is seed dormancy?
(Solved)
What is seed dormancy?
Date posted:
May 12, 2017
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Answers (1)
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State three roles of auxins in a plant stem.
(Solved)
State three roles of auxins in a plant stem.
Date posted:
May 12, 2017
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Answers (1)
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(a) State two differences between complete and incomplete metamorphosis.
(b) State the importance of moulting to an insect.
(Solved)
(a) State two differences between complete and incomplete metamorphosis.
(b) State the importance of moulting to an insect.
Date posted:
May 12, 2017
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Answers (1)