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(a) (i) Species A
(ii) The rate of growth (multiplication) of species A is higher than that of B
(b) (i) Population increased exponentially (rapidly); due to high number of reproducing individuals; and
suitable environmental conditions(such as food , space, resources not limiting e.tc.)
(iii) Population becomes constant; because of shortage of resources like food and space; and birth rate
equals death rate
(c) Species A would decrease; due to predation; while the population of species B would increase; due to
less competition for food with species A/ more resources or food available
(d)
(i) Predation
(ii) Parasitism
(iii) Symbiosis
(iv) Saprophytism
(e) (i) Photographic light meter
(ii) Sacchi disc
(iii) Anemometer
(iv) Barometer
marto answered the question on September 30, 2019 at 10:54
- (a) Name two substances transported in blood plasma.
(i)
(ii)
(b) Wanjiru is blood group A.
(i) Name an antibody found in her blood plasma.
(ii) Name...(Solved)
(a) Name two substances transported in blood plasma.
(i)
(ii)
(b) Wanjiru is blood group A.
(i) Name an antibody found in her blood plasma.
(ii) Name an antigen found in her red blood cell.
(iii) Name the blood groups she can donate to
Blood groups-
(i)
(ii)
(c) What is meant by the term allergy?
(d) Name one substance that can cause allergy
Date posted: September 30, 2019. Answers (1)
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The diagram below represents two process underwent by a plant cell.
(a) Identify process X
(b) Name the state of the cell after undergoing process
(i) X.
(ii) Z .
(c) Name the substance which is found in parts labelled;
(i) P.
(ii) Y .
(d) Name parts labelled M and Q.
(e) Name the cell organelle which is usually referred to as 'cell’s kitchen'.
Date posted: September 30, 2019. Answers (1)
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In an experiment to analyze a 200cm3 sample of air was treated with pyrogallic acid. This reduced its volume to 168cm3. Potassium hydroxide was then added and the volume of gas reduced further to 160cm3.
(a) What was the role of pyrogallic acid?
(b) What was the role of potassium hydroxide?
(c) Calculate the percentage of oxygen and percentage of carbon (iv) oxide in the sample
(d) Suggest the likely biological source of carbon (iv)oxide gas.
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Date posted: September 30, 2019. Answers (1)
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The following diagram shows a cell at a certain stage of cell division.
a) Name the type and stage of cell division.
Type
Stage
(b) (i) Give one reason for your answer in (a) above
(ii) What is the significance of the process shown in the diagram above in relation to the
behavior of chromosomes?
(c) What is the general name of organs where the above process occurs?
(d) Name the part labeled;
C
F
(e) State the significance of part labeled A in relation to the process shown above ?
(f) Name one cell in plants which is haploid
Date posted: September 30, 2019. Answers (1)
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(a) Name the groups of organism represented by J.
(b) Name the process represented by R,P,M and N.
(c) Name one process represented by T.
(d) (i) Name a structure in roots involved in process M.
(ii) State one adaptation of the structure named in d (i) above to its function
Date posted: September 30, 2019. Answers (1)
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b) State two importance of the above type of cell division
Date posted: September 30, 2019. Answers (1)
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In a capture-recapture exercise to estimate population size of dragon flies on a stretch of rivers, 250flies were first caught and marked. Two days later 500 flies were caught in the second capture and out of this, 50 flies had marks on their bodies. Estimate the population size of the flies. (show your working)
Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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During a surgical operation, a doctor accidentally cut two blood vessels A and B. Out of blood vessel A, blood was spurting out while through blood vessel B, blood was flowing smoothly.
i) Identify blood vessels A and B.
Date posted: September 30, 2019. Answers (1)
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Date posted: September 30, 2019. Answers (1)
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b) Oestrogen.
c) Luteinizing hormone.(Solved)
Give the role of the following hormones during menstrual cycle.
a) Follicle stimulating hormone.
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Date posted: September 30, 2019. Answers (1)
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(Solved)
The table below shows the changes brought by hormones during reproduction in human females. Fill in the table.
Date posted: September 30, 2019. Answers (1)
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A student examining pond water came across a certain living organisms which he drew as shown below.
i) Identify the organism shown above.
ii) State the kingdom of the above organism.
iii) Name the structure labeled A.
iv) State the function of the part labeled B.
Date posted: September 30, 2019. Answers (1)
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State the circumstances in which more blood Sugar may be found in the hepatic portal vein than in any other blood vessels.
Date posted: September 30, 2019. Answers (1)