(a) (i) Anaphase 1
(ii) - Homologous chromosomes separates at the equator
- Chromosomes start migrating to opposite poles
- Sister chromatids attached at the centromere
(b) Spindle fibres
(c) It is the reduction phase that results in haploid sex cells/gamete cells.
johnmulu answered the question on May 9, 2017 at 09:51
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The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
(Solved)
The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
(a) What type of cell division takes place at Z.
(b) Where in the body of a female does process Z occur.
(c) Name the process that leads to addition or loss of one or more chromosomes
(d) Name the process that leads to addition or loss of one or more chromosomes
(e) State three benefits of polyloidy in plants to a farmer.
Date posted:
May 9, 2017
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Answers (1)
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Explain how the following prevent self-pollination. (i) Protandry (ii) Self-sterility.
(Solved)
Explain how the following prevent self-pollination. (i) Protandry (ii) Self-sterility.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below illustrates the structure of the female part of a flower.
(Solved)
The diagram below illustrates the structure of the female part of a flower.
(a) Name the part labelled W.
(b) Describe what happens when pollen tubes enters the structure labelled V
(c) What do structures labelled R and T develop into after fertilization?
Date posted:
May 9, 2017
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Answers (1)
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State four characteristics of fruit dispersed by animals.
(Solved)
State four characteristics of fruit dispersed by animals.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below illustrates a growing pollen tube.
(Solved)
The diagram below illustrates a growing pollen tube.
(a) Name the part labeled B.
(b) Explain the role of the parts labeled A.
Date posted:
May 9, 2017
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Answers (1)
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Name three mechanisms that ensure cross pollination takes place in flowering plants.
(Solved)
Name three mechanisms that ensure cross pollination takes place in flowering plants.
Date posted:
May 9, 2017
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Answers (1)
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The diagram below represent a transverse section of an ovary from a certain flower.
(Solved)
The diagram below represent a transverse section of an ovary from a certain flower.
(i) Name the structure labeled W.
(ii) Name the type of placentation illustrated in this diagram
Date posted:
May 9, 2017
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Answers (1)
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A flower was found to have the following characteristics:
Inconspicuous petals
Long feathery stigma
Small, light pollen grains
(a) What is the likely agent of pollination of the flower?
(b) What is the significance of the flower?
(Solved)
A flower was found to have the following characteristics:
Inconspicuous petals
Long feathery stigma
Small, light pollen grains
(a) What is the likely agent of pollination of the flower?
(b) What is the significance of the flower?
Date posted:
May 9, 2017
.
Answers (1)
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State three characteristics that ensures cross-pollination takes place in flowering plants.
(Solved)
State three characteristics that ensures cross-pollination takes place in flowering plants.
Date posted:
May 9, 2017
.
Answers (1)
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The diagram below shows a transverse section of a leaf.
(Solved)
The diagram below shows a transverse section of a leaf.
(a) Name the habitat of the plant from which the leaf is obtained.
(b) Give two reasons for your answer in (a) above.
Date posted:
May 8, 2017
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Answers (1)
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Other than using the quadrat, give two methods of estimating population of grass.
(Solved)
Other than using the quadrat, give two methods of estimating population of grass.
Date posted:
May 8, 2017
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Answers (1)
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How is aerenchyma tissue adapted to its function
(Solved)
How is aerenchyma tissue adapted to its function
Date posted:
May 8, 2017
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Answers (1)
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(a) Name the bacteria found in the root nodules of leguminous plant.
(b) State the association of the bacteria named in (a) above with the leguminous plants.
(Solved)
(a) Name the bacteria found in the root nodules of leguminous plant.
(b) State the association of the bacteria named in (a) above with the leguminous plants.
Date posted:
May 8, 2017
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Answers (1)
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The diagram below represents the nitrogen cycle
(Solved)
The diagram below represents the nitrogen cycle
(a) State the process labeled
A..
D..
(b) Name the compound represented by B
(c) Name the group of organisms labeled C
(d) How would excess pesticides in the soil interfere with process A.
Date posted:
May 8, 2017
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Answers (1)
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Explain how birds of prey are adapted to obtaining their food.
(Solved)
Explain how birds of prey are adapted to obtaining their food.
Date posted:
May 8, 2017
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Answers (1)
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Suggest three reasons why green plants are included in a fish aquarium.
(Solved)
Suggest three reasons why green plants are included in a fish aquarium.
Date posted:
May 8, 2017
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Answers (1)
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Give two reasons why primary productivity in an aquatic ecosystem decreases with depth.
(Solved)
Give two reasons why primary productivity in an aquatic ecosystem decreases with depth.
Date posted:
May 8, 2017
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Answers (1)
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The diagram below represents a simplified nitrogen cycle
(Solved)
The diagram below represents a simplified nitrogen cycle
(a) Name the organisms that cause process E and J
(b) Name the process represented by F and H.
(c) Name the group of organism represented by G.
Date posted:
May 8, 2017
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Answers (1)
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The diagram below represents a feeding relationship in an ecosystem
(Solved)
The diagram below represents a feeding relationship in an ecosystem
(a) Write down the food chains in which the guinea fowls are secondary consumers.
(b) What would be the short term effects on the ecosystem if lions invaded the area?
(c) Name the organism through which energy from the sun enters the food web
Date posted:
May 8, 2017
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Answers (1)
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Oil can be applied on the stagnant water to control the spread of malaria.
(Solved)
Oil can be applied on the stagnant water to control the spread of malaria.
(a) How does this practice control the spread of malaria?
(b) Give a reason why this practice should be discouraged.
Date posted:
May 8, 2017
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Answers (1)