Fovea centralis has high concentration of photoreceptors/cones while blind spot has no photoreceptors/cones;
sharon kalunda answered the question on May 24, 2019 at 11:12
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State the role of the iris in the human eye.
(Solved)
State the role of the iris in the human eye.
Date posted:
May 24, 2019
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Answers (1)
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The diagram below represents a section through a human tooth.
a) Name the type of tooth shown.
b) Give a reason for your answer in (a) above....
(Solved)
The diagram below represents a section through a human tooth.
a) Name the type of tooth shown.
b) Give a reason for your answer in (a) above.
c) List and state the functions of two structures found in the part labelled K.
Date posted:
May 24, 2019
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Answers (1)
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State the function of pneumatophores.
(Solved)
State the function of pneumatophores.
Date posted:
May 24, 2019
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Answers (1)
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Name the tissue in the stem and leaves of hydrophytes that allows them to store air for gaseous exchange.
(Solved)
Name the tissue in the stem and leaves of hydrophytes that allows them to store air for gaseous exchange..
Date posted:
May 24, 2019
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Answers (1)
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State the role of ATP molecule during active transport across the cell membrane of the plant root hair.
(Solved)
State the role of ATP molecule during active transport across the cell membrane of the plant root hair.
Date posted:
May 24, 2019
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Answers (1)
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Name the type of circulatory system found in the phylum Arthropoda.
(Solved)
Name the type of circulatory system found in the phylum Arthropoda.
Date posted:
May 24, 2019
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Answers (1)
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The reaction represented by the equation below occurs in the body.
a) Name enzyme Y
b) Name an organ in the body where the reaction occurs.
(Solved)
The reaction represented by the equation below occurs in the body.
a) Name enzyme Y
b) Name an organ in the body where the reaction occurs.
Date posted:
May 24, 2019
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Answers (1)
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Describe the process of excretion in the kidney.
(Solved)
Describe the process of excretion in the kidney.
Date posted:
May 24, 2019
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Answers (1)
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Briefly explain how any three factors affect population growth.
(Solved)
Briefly explain how any three factors affect population growth.
Date posted:
May 24, 2019
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Answers (1)
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The figure below shows a section through a leaf. A leaf is designed for photosynthesis and this process provides a supply of simple sugars for...
(Solved)
The figure below shows a section through a leaf. A leaf is designed for photosynthesis and this process provides a supply of simple sugars for a plant.
(a) State the adaptation of the chloroplasts to photosynthesis.
(b) Name a mineral ion in chloroplast.
(c) (i) Name the tissues that translocates sugar from the leaves to other parts of the plants.
(ii) How is the tissue named in c(i) above adapted to its function?
(d) Write a word equation for the process of photosynthesis.
Date posted:
May 24, 2019
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Answers (1)
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In an experiment, a black mouse was mated with a brown mouse. All the offsprings in F1 generated were black. The offspring grew and were...
(Solved)
In an experiment, a black mouse was mated with a brown mouse. All the offsprings in F1 generated were black. The offspring grew and were all allowed to mate with one another. The total number of F2 generation offspring were 96.
(a) Using letter B to denote the gene for black colour, work out the genotype of the F1 generation.(Use a punnet square)
(b) State the following for the F2 generation.
(i) Genotypic ratio.
(ii) Phenotypic ratio
(iii) The total number of brown mice.
Date posted:
May 24, 2019
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Answers (1)
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The figure below shows a light microscope.
(Solved)
The figure below shows a light microscope.
(a) State the functions of the parts labelled 1, 2, and 3.
(b) (i) State two differences between an electron microscope and a light microscope.
(ii) Give one advantage of using a light microscope over that of an electron microscope.
(c) Calculate the magnification that is obtained when an object is viewed with a X10 eye piece and a X100 objective lens.
Date posted:
May 24, 2019
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Answers (1)
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The figure below represents three cells 1, 2 and 3.
Identify the three regions of the root tip from which the cell were got from?
(Solved)
The figure below represents three cells 1, 2 and 3.
Identify the three regions of the root tip from which the cell were got from?
Date posted:
May 24, 2019
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Answers (1)
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The following diagram is a longitudinal section of the root apex.
Identify the parts labeled A, B and C.
(Solved)
The following diagram is a longitudinal section of the root apex.
Identify the parts labeled A, B and C.
Date posted:
May 24, 2019
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Answers (1)
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What is meant by bivalent chromosome.
(Solved)
What is meant by bivalent chromosome.
Date posted:
May 24, 2019
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Answers (1)
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Give three examples of complex carbohydrates.
(Solved)
Give three examples of complex carbohydrates.
Date posted:
May 24, 2019
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Answers (1)
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Name two sex-linked characteristics in human determined by genes located on Y- chromosome.
(Solved)
Name two sex-linked characteristics in human determined by genes located on Y- chromosome.
Date posted:
May 24, 2019
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Answers (1)
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The graph below represents the growth in a certain phylum.
(a) Name the type of growth pattern shown on the graph.
(b) Identify the process represented...
(Solved)
The graph below represents the growth in a certain phylum.
(a) Name the type of growth pattern shown on the graph.
(b) Identify the process represented by X.
(c) Name the hormone responsible for the process in (b) above.
Date posted:
May 24, 2019
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Answers (1)
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What characteristics do mammalian lungs and the gills of bony fish have in common that enables them to exchange gases efficiently?
(Solved)
What characteristics do mammalian lungs and the gills of bony fish have in common that enables them to exchange gases efficiently?
Date posted:
May 24, 2019
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Answers (1)
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What is the importance of chewing food?
(Solved)
What is the importance of chewing food?
Date posted:
May 24, 2019
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Answers (1)