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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
- 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. Answers (1)
- An experiment was set up as shown below.
a) Suggest the observations made after 20 minutes.
b) Explain the observations.(Solved)
An experiment was set up as shown below.
a) Suggest the observations made after 20 minutes.
b) Explain the observations.
Date posted: May 24, 2019. Answers (1)
- Below is a diagram of an organelle.
a) State the function of the organelle drawn above.
b) Name the parts of the organelle where:
i) Oxygen gas...(Solved)
Below is a diagram of an organelle.
a) State the function of the organelle drawn above.
b) Name the parts of the organelle where:
i) Oxygen gas is produced as a by-product
ii) Carbon (IV) oxide is utilized.
Date posted: May 24, 2019. Answers (1)
- 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. Answers (1)
- State the function of pneumatophores.(Solved)
State the function of pneumatophores.
Date posted: May 24, 2019. Answers (1)
- 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. Answers (1)
- The diagrams below shows some components of xylem.
a) Identify C and D
b) Describe structural difference between the two components.(Solved)
The diagrams below shows some components of xylem.
a) Identify C and D
b) Describe structural difference between the two components.
Date posted: May 24, 2019. Answers (1)
- State the function of the following structures.
a) Fallopian tube
b) Endometrium(Solved)
State the function of the following structures.
a) Fallopian tube
b) Endometrium
Date posted: May 24, 2019. Answers (1)
- The diagram below shows a bone of hind limb. Study it and answer the questions that follow.
a) Name the bone
b) Name the parts labelled Q...(Solved)
The diagram below shows a bone of hind limb. Study it and answer the questions that follow.
a) Name the bone
b) Name the parts labelled Q and R.
c) Name the structure that articulates with the part labelled Z and the joint formed?
Structure
Joint
Date posted: May 24, 2019. Answers (1)
- Work out a phenotypic ratio if children of a couple with normal skin but are carriers of the albino trait. Use letter A to
represent the...(Solved)
Work out a phenotypic ratio if children of a couple with normal skin but are carriers of the albino trait. Use letter A to
represent the gene for normal skin pigmentation.
Date posted: May 24, 2019. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- Describe the process of excretion in the kidney.(Solved)
Describe the process of excretion in the kidney.
Date posted: May 24, 2019. Answers (1)
- Briefly explain how any three factors affect population growth.(Solved)
Briefly explain how any three factors affect population growth.
Date posted: May 24, 2019. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- Name the tissues which are responsible for growth in;
(i) girth
(ii) length(Solved)
Name the tissues which are responsible for growth in;
(i) girth
(ii) length
Date posted: May 24, 2019. Answers (1)
- 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. Answers (1)