Get premium membership and access questions with answers, video lessons as well as revision papers.
- Ring the bark of an actively growing plant;
- Use radiactive carbon (C14) / radioactive traces; use insects sucking juices from stems like aphids;
Kavungya answered the question on September 30, 2019 at 12:44
- State two disadvantages that organisms with small surface area to volume ratio
experience over those with larger.(Solved)
State two disadvantages that organisms with small surface area to volume ratio
experience over those with larger.
Date posted: September 30, 2019. Answers (1)
- Give the formula used to calculate surface area to volume ratio of an organism.(Solved)
Give the formula used to calculate surface area to volume ratio of an organism.
Date posted: September 30, 2019. Answers (1)
- Give the advantage of using low power magnification instead of high power when viewing specimens under a microscope.(Solved)
Give the advantage of using low power magnification instead of high power when viewing specimens under a microscope.
Date posted: September 30, 2019. Answers (1)
- State the importance of egg being larger than sperm in vertebrates.(Solved)
State the importance of egg being larger than sperm in vertebrates.
Date posted: September 30, 2019. Answers (1)
- Give three features in Irish potato tube that qualify it to be a stem tuber.(Solved)
Give three features in Irish potato tube that qualify it to be a stem tuber.
Date posted: September 30, 2019. Answers (1)
- An organism can be used to control the population of a pest or disease causative organism.
a) Name the method described.
b) State the advantage of the...(Solved)
An organism can be used to control the population of a pest or disease causative organism.
a) Name the method described.
b) State the advantage of the method named in (a) above.
Date posted: September 30, 2019. Answers (1)
- Name the process which occurs in root hair cells that lead to absorption of water.(Solved)
Name the process which occurs in root hair cells that lead to absorption of water.
Date posted: September 30, 2019. Answers (1)
- Describe the digestion of a piece of beef rich in fat in human digestive system from
the mouth until it is absorbed in the blood stream.(Solved)
Describe the digestion of a piece of beef rich in fat in human digestive system from
the mouth until it is absorbed in the blood stream.
Date posted: September 30, 2019. Answers (1)
- Describe how various endo-parasites are adapted for survival in their hosts.(Solved)
Describe how various endo-parasites are adapted for survival in their hosts.
Date posted: September 30, 2019. Answers (1)
- Giving examples differentiate between ecto-parasites and endo-parasites.(Solved)
Giving examples differentiate between ecto-parasites and endo-parasites.
Date posted: September 30, 2019. Answers (1)
- Quantity of Urine passed per day was established in five mammals A, B, C, D and E of the same species in their natural habitats....(Solved)
Quantity of Urine passed per day was established in five mammals A, B, C, D and E of the same species in their natural habitats. The results are shown below.
(i) Which of the five Mammals was likely to be excreting Urine very rich in ammonia? Give a reason.
(ii) Which of the five mammals was likely to be living in a desert? Give a reason.
(iii) State two structural differences expected in the nephrons of mammals And D.
(iv) State how antidiuretic hormone (ADH) affect the amount of Urine produced by a mammal per day.
Date posted: September 30, 2019. Answers (1)
- How is High pressure achieved in the kidney?(Solved)
How is High pressure achieved in the kidney?
Date posted: September 30, 2019. Answers (1)
- State the principal requirement of filtration that forms glomeruli filtrate.(Solved)
State the principal requirement of filtration that forms glomeruli filtrate.
Date posted: September 30, 2019. Answers (1)
- In an investigation, the appropriate composition of plasma, glomerula filtrate and urine in a mammal was determined. The results were as shown on the table.
(a)...(Solved)
In an investigation, the appropriate composition of plasma, glomerula filtrate and urine in a mammal was determined. The results were as shown on the table.
(a) Account for the absence of;
(i) Plasma protein in glomerula filtrate.
(ii) Glucose and amino acids in urine.
(b) (i) From the above results, identify two types of wastes eliminated from mammalian
blood.
(ii) Other than excretion, give one other function of the mammalian kidney.
Date posted: September 30, 2019. Answers (1)
- State the advantages of the cell protoplasm being colloidal in nature.(Solved)
State the advantages of the cell protoplasm being colloidal in nature.
Date posted: September 30, 2019. Answers (1)
- State two ways by which mammalian blood carry out homeostasis function.(Solved)
State two ways by which mammalian blood carry out homeostasis function.
Date posted: September 30, 2019. Answers (1)
- The organelle below is important in the process of Nutrition.(Solved)
The organelle below is important in the process of Nutrition.
a) Identify the organelle
b) Name the parts labeled
c)Name the part where the following stages of photosynthesis occur
d)State the role of light in the processes of photosynthesis
Date posted: September 30, 2019. Answers (1)
- A potential mother of blood group B- requires a blood transfusion before her first pregnancy, what blood group(s) can she receive safely if the husband...(Solved)
A potential mother of blood group B- requires a blood transfusion before her first pregnancy, what blood group(s) can she receive safely if the husband is of Rh+ ve blood. Explain your answer.
Date posted: September 30, 2019. Answers (1)
- Evolutionary changes take place in a population to maintain a balanced community, basing your answer on blood transfusion, explain the role played by nature on...(Solved)
Evolutionary changes take place in a population to maintain a balanced community, basing your answer on blood transfusion, explain the role played by nature on distribution of;
(i) Blood group O
(ii) Blood group AB in the population
Date posted: September 30, 2019. Answers (1)
- The table below shows the approximate distribution of human blood groups in a sample of 100 people in a population.
Calculate the percentage of Rhesus negative...(Solved)
The table below shows the approximate distribution of human blood groups in a sample of 100 people in a population.
Calculate the percentage of Rhesus negative (Rh -) in the whole group of donors.
Date posted: September 30, 2019. Answers (1)