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- Name two growth hormones in insects which influence their growth pattern.(Solved)
Name two growth hormones in insects which influence their growth pattern.
Date posted: May 28, 2019. Answers (1)
- The diagrams below shows leaves obtained from five different plants.
Using the key provided identify the plants from which the leaves were obtained in each case...(Solved)
The diagrams below shows leaves obtained from five different plants.
Using the key provided identify the plants from which the leaves were obtained in each case give the sequence of steps in the key which you followed to arrive at the identify.
1 (a) Leaf simple -------------------------------------------------------------- go to 2
(b) Leaf compound ---------------------------------------------------------------- go to 4
2. (a) Leaf with parallel veins------------------------------------------------------- Maize
(b) Leaf with network vein ------------------------------------------------------- go to 3
3. (a) Leaf margin smooth ---------------------------------------------------- Bougainvillea
(b) Leaf margin serrated ---------------------------------------------------------- Hibiscus
4. (a) Leaflets emerging from one stalk like fingers ------------------------ Bombax
(b) Leaflets emerging from several stalk attached to main stalk-------- Acacia
(b) State three differences between the classes from which leaf A and leaf B were obtained from.
Date posted: May 28, 2019. Answers (1)
- In an ecological study a certain insect population and that of predators was estimated in a certain grassland over a period of 1 year (one...(Solved)
In an ecological study a certain insect population and that of predators was estimated in a certain grassland over a period of 1 year (one year).
(a) Using the information above plot on the same axis the graph of number of insects and number of predators against time in months.
(b) Suggest what happens to the insect’s population during dry months.
(c) Explain the relationship between the insect population and that of predators.
(d) Suggest what happens to the predator’s population during dry month.
(e) Name the trophic level occupied by:-
(i) Predator
(ii) Insects
(iii) Grass
(f) Name the method used to estimate population of:
(i) Predator
(ii) Insects
(iii) Grass
Date posted: May 28, 2019. Answers (1)
- What is the function of enzyme Enterokinase?(Solved)
What is the function of enzyme Enterokinase?
Date posted: May 28, 2019. Answers (1)
- Study the equation below and answer the questions that follow.
(a) Name product P.
(b) Name the reaction represented by letter: X and Y(Solved)
Study the equation below and answer the questions that follow.
(a) Name product P.
(b) Name the reaction represented by letter: X and Y
Date posted: May 28, 2019. Answers (1)
- Define a fossil.(Solved)
Define a fossil.
Date posted: May 28, 2019. Answers (1)
- Students set up an experiment as shown below. Use it to answer the questions that follow.
(a) What was the aim of the experiment?
(b) What...(Solved)
Students set up an experiment as shown below. Use it to answer the questions that follow.
(a) What was the aim of the experiment?
(b) What observation would be made in test tube B?
(c) Explain the results in (b) above.
(d) Write word equation for the process of anaerobic respiration in plants.
(e) State four application of anaerobic respiration.
Date posted: May 28, 2019. Answers (1)
- In fruit flies (Drosophila melanongaster) inheritance of eye colour is sex linked. The gene for red eye is dominant.
Across was made between homozygous red eyed...(Solved)
In fruit flies (Drosophila melanongaster) inheritance of eye colour is sex linked. The gene for red eye is dominant.
Across was made between homozygous red eyed female and white eyed male. Work out the phenotypic ratio of F1
generation. (Use R to represent gene for red eyes).
Date posted: May 28, 2019. Answers (1)
- Name the hormone secreted by the Thyroid glands.(Solved)
Name the hormone secreted by the Thyroid glands.
Date posted: May 28, 2019. Answers (1)
- What is tissue fluid?(Solved)
What is tissue fluid?
Date posted: May 28, 2019. Answers (1)
- The apparatus below are used to investigate an aspect of photosynthesis.
(a) Name the aspect of photosynthesis being investigated.
(b) How can one verify the identity...(Solved)
The apparatus below are used to investigate an aspect of photosynthesis.
(a) Name the aspect of photosynthesis being investigated.
(b) How can one verify the identity of the gas that accumulates in test tube?
(c) State the role of sodium hydrogen carbonate.
(d) What environmental factor are required in order to give positive results?
Date posted: May 28, 2019. Answers (1)
- State three distinguishing features of mammalian rib bone.(Solved)
State three distinguishing features of mammalian rib bone.
Date posted: May 28, 2019. Answers (1)
- Define speciation.(Solved)
Define speciation.
Date posted: May 28, 2019. Answers (1)
- State the site of production of progesterone.(Solved)
State the site of production of progesterone.
Date posted: May 28, 2019. Answers (1)
- The diagram shows across section of mammalian skin.
(a) Name parts T and S.
(b) State the function of part labelled S.(Solved)
The diagram shows across section of mammalian skin.
(a) Name parts T and S.
(b) State the function of part labelled S.
Date posted: May 28, 2019. Answers (1)
- Study the reaction below.
(a) Name enzyme X.
(b) Explain the importance of the above reaction in tissue of living organisms.(Solved)
Study the reaction below.
(a) Name enzyme X.
(b) Explain the importance of the above reaction in tissue of living organisms.
Date posted: May 28, 2019. Answers (1)
- Give a reason why lumbar vertebrae have long and broad transverse processes.(Solved)
Give a reason why lumbar vertebrae have long and broad transverse processes.
Date posted: May 28, 2019. Answers (1)
- Distinguish between homozygote and heterozygote.(Solved)
Distinguish between homozygote and heterozygote.
Date posted: May 28, 2019. Answers (1)
- A certain plant had the following characteristics:
- Presence of roots, stem and leaves.
- Found with sori on the under surface.
- Life cycle in sporophyte and...(Solved)
A certain plant had the following characteristics:
- Presence of roots, stem and leaves.
- Found with sori on the under surface.
- Life cycle in sporophyte and gametophyte generations.
- Sporophyte generation being dominant.
Name the division to which the plant belongs.
Date posted: May 28, 2019. Answers (1)
- Name the kingdom into which the prokaryotes are placed.(Solved)
Name the kingdom into which the prokaryotes are placed.
Date posted: May 28, 2019. Answers (1)