Get premium membership and access questions with answers, video lessons as well as revision papers.
a) In diffusion molecules move from a highly concentration region to a lowly concentration region, while in active transport molecules move from a lowly concentration region to a highly concentration region
ii) In diffusion molecules move along concentrated gradient while in active transport molecules move against concentration gradient
iii) No energy is required in diffusion while energy is required in active transport
b) i)- Absorption of water from the soil by root hair cells
- Movement of water between plant cells or from cell to cell;
- Support in herbaceous plants due to turgidity of cells
- Feeding in insectivorous plant.
ii) -Movement of water from cell to cell in animals
-Water reabsorption by blood capillaries from renal tubules/ absorption of water in colon or gut
johnmulu answered the question on April 29, 2017 at 05:10
- The diagram below show a red blood cell that was subjected to a certain treatment (Solved)
The diagram below show a red blood cell that was subjected to a certain treatment
Account for shape of the cell at the end of the experiment
Date posted: April 28, 2017. Answers (1)
- Distinguish between diffusion and osmosis(Solved)
Distinguish between diffusion and osmosis.
Date posted: April 28, 2017. Answers (1)
- An experiment was set up as shown below(Solved)
An experiment was set up as shown below
The set up was left for 30 minutes.
a) State the expected results.
b) Explain your answer in (a) above
Date posted: April 28, 2017. Answers (1)
- State the importance of osmosis in plant(Solved)
State the importance of osmosis in plant
Date posted: April 28, 2017. Answers (1)
- a) What is diffusion?
b) How do the following factors affect the rate of diffusion? (Solved)
a) What is diffusion?
b) How do the following factors affect the rate of diffusion?
i) Diffusion gradient
ii) Surface area to volume ratio
iii) Temperature
Date posted: April 28, 2017. Answers (1)
- Why is oxygen important in the process of active transport in cells? (Solved)
Why is oxygen important in the process of active transport in cells?
Date posted: April 28, 2017. Answers (2)
- Explain what would happen to a red blood cells if they are placed in a concentrated salt solution(Solved)
Explain what would happen to a red blood cells if they are placed in a concentrated salt solution
Date posted: April 28, 2017. Answers (1)
- State the functions of the following parts of a light microscope.
a) Objective lens
b) Diaphragm
(Solved)
State the functions of the following parts of a light microscope.
a) Objective lens
b) Diaphragm
Date posted: April 28, 2017. Answers (1)
- a) State two advantages of using a coverslip when preparing a specimen for observation under a light microscope.
b) How is the low power objective lens manipulated to focus a specimen for observation under a light microscope?
(Solved)
a) State two advantages of using a coverslip when preparing a specimen for observation under a light microscope.
b) How is the low power objective lens manipulated to focus a specimen for observation under a light microscope?
Date posted: April 28, 2017. Answers (1)
- State one function of each of the following cell organelles:
(Solved)
State one function of each of the following cell organelles:
a) Golgi bodies
b) Lysosomes.
Date posted: April 28, 2017. Answers (1)
- A student drew a 6 cm long diagram of a plant flower. If the actual length of the flower was 12 cm, calculate the magnification of the drawing made by the student. Show your working(Solved)
A student drew a 6 cm long diagram of a plant flower. If the actual length of the flower was 12 cm, calculate the magnification of the drawing made by the student. Show your working
Date posted: April 28, 2017. Answers (1)
- State one way in which each of the following is structurally adapted to its function:
a) neurone;
b) Mitochndrion.
(Solved)
State one way in which each of the following is structurally adapted to its function:
a) neurone;
b) Mitochndrion.
Date posted: April 28, 2017. Answers (1)
- Name the organelle that is involved in each of the following(Solved)
Name the organelle that is involved in each of the following
a) Manufacture of lipids
b) Formation of lysosomes
Date posted: April 28, 2017. Answers (1)
- a) Name the part of a light microscope used to bring an image of a specimen into sharp focus.
b) Why is it recommended to keep the stage of the microscope dry?
(Solved)
a) Name the part of a light microscope used to bring an image of a specimen into sharp focus.
b) Why is it recommended to keep the stage of the microscope dry?
Date posted: April 28, 2017. Answers (1)
- The figure below is a fine structure of a generalized animal cell as seen under an electron microscope.(Solved)
The figure below is a fine structure of a generalized animal cell as seen under an electron microscope.
a) Name the parts labeled A and B.
b) How the is structure labeled B adapted to its function?
Date posted: April 28, 2017. Answers (1)
- Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues(Solved)
Give reasons for carrying out the following procedures when preparing temporary wet mounts of plant tissues
a) Making thin plant sections.
b) Adding water on the plant section.
c) Placing a cover slip over the plant section.
Date posted: April 28, 2017. Answers (2)
- State the functions of the following parts of a light microscope.(Solved)
State the functions of the following parts of a light microscope.
Fine adjustment knob
Stage
Date posted: April 27, 2017. Answers (1)
- The diagram below shows a specified plant cell(Solved)
The diagram below shows a specified plant cell
a) i) Name the cell.
ii) Name the parts labeled D and E
b) State the function
Date posted: April 27, 2017. Answers (1)
- State the function of the following cell organelles
(Solved)
State the function of the following cell organelles
a) Ribosome
b) Lysosomes
Date posted: April 27, 2017. Answers (1)
- State two functions of the endoplasmic reticulum(Solved)
State two functions of the endoplasmic reticulum
Date posted: April 27, 2017. Answers (1)