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- Explain why it is not possible to drown a locust while holding its head under water.(Solved)
Explain why it is not possible to drown a locust while holding its head under water.
Date posted: May 27, 2019. Answers (1)
- Differentiate between O+ and O- blood group.(Solved)
Differentiate between O+ and O- blood group.
Date posted: May 27, 2019. Answers (1)
- The diagrams below shows two types of patterns of lignification in xylem vessels.
Name the pattern in
Figure 1 .
Figure 2 .(Solved)
The diagrams below shows two types of patterns of lignification in xylem vessels.
Name the pattern in
Figure 1 .
Figure 2 .
Date posted: May 27, 2019. Answers (1)
- The flow diagram below represents photosynthesis process. Study it and answer the questions that follow.
Name the substances:A,B and C.(Solved)
The flow diagram below represents photosynthesis process. Study it and answer the questions that follow.
Name the substances:A,B and C.
Date posted: May 27, 2019. Answers (1)
- The following experiment was set up to investigate the action of protease on egg white.
After 15 minutes, the contents of the beaker became clear, explain...(Solved)
The following experiment was set up to investigate the action of protease on egg white.
After 15 minutes, the contents of the beaker became clear, explain this observation.
Date posted: May 27, 2019. Answers (1)
- State two functions of tongue during digestion in the mouth of man.(Solved)
State two functions of tongue during digestion in the mouth of man.
Date posted: May 27, 2019. Answers (1)
- In an experiment, raw banana was peeled, mashed into a paste and was treated as shown in the set-up below.
a) Name the physiological process being...(Solved)
In an experiment, raw banana was peeled, mashed into a paste and was treated as shown in the set-up below.
a) Name the physiological process being investigated.
b) State the expected colour of the solutions inside the visking tubing after 30 minutes.
c) Explain the observation made in (b) above.
Date posted: May 27, 2019. Answers (1)
- The table below shows differences in the relative concentrations of various ions in the cell sap of a sea weed (valonia) and in
the sea water...(Solved)
The table below shows differences in the relative concentrations of various ions in the cell sap of a sea weed (valonia) and in
the sea water in which it is growing.
a) Name the process by which the following ion will enter the cell sap of the valonia cells.
i) Sulphates
ii) Chlorides
b) Give a reason for each of your answers in (a) (i) and (a) (ii) above.
Date posted: May 27, 2019. Answers (1)
- The photographs below are of bones obtained from the same region of a mammal body.
a) Name the region from which bones were obtained.
b) Identify the...(Solved)
The photographs below are of bones obtained from the same region of a mammal body.
a) Name the region from which bones were obtained.
b) Identify the bones.
K
N
c) State three ways by which bone K is adapted to its function.
d) Giving a reason, name the type of joint that would be found in the animal at the proximal and distal ends of bone N.
Proximal end
Reason
Distal end
Reason
e) What is the significance of the part labelled J in the bone N?
Date posted: May 27, 2019. Answers (1)
- You are provided with photograph of specimens labelled A, B, C, D,E,F,GandH.Study them carefully then answer the questions that follow.
1. (a)Group of florets/inflorescence……………………….go to2
(b)simple flowers………………………………………..go...(Solved)
You are provided with photograph of specimens labelled A, B, C, D,E,F,GandH.Study them carefully then answer the questions that follow.
1. (a)Group of florets/inflorescence……………………….go to2
(b)simple flowers………………………………………..go to 4
2. (a)Florets compacted into compact heads………………compositae
(b)florets not compcted but arranged in spikes…………..go to3
3. (a)Florets conspicuous /purple in colour……………….Amaranthacea.
(b)Florets inconspicuous/green in colour……………….Graminae
4. (a)Flower polysepalous/many free sepals……………..Rosacea
(b)Flower gamesepalous……………………..go to 5
5. (a)Flowers with more than five anthers……..Umbelliferae
(b)Flowers with five or less anthers…………go to 6
6. (a)Petals form a corolla tube/gamepetalous…mimmosacea
(b)petals do not form corolla tube…………..go to 7
7. (a)Flowers with large anthers………………Solanacea
(b)Flowers with small anthers………………Ranunclulacea
Use the dichotomus key provided to Identify each specimen.In each case show in sequence the steps.In the key that you followed to arrive at the identity of each specimen.
b) (i) What is the likely agent of pollination of specimen C and E?
C
E
(ii) Briefly explain an adaptive feature of specimen C to the mode of pollination you have named in b(i) above
c) Describe the ovary of specimen B and G using the most suitable biological terms.
d) Supply a term used to describe the flower of specimen E and F.
Date posted: May 27, 2019. Answers (1)
- Describe one method that can be used to measure the average growth rate of a single leaf.(Solved)
Describe one method that can be used to measure the average growth rate of a single leaf.
Date posted: May 27, 2019. Answers (1)
- Shown below is a section through the mammalian nephron.
a) Name the structures labelled:
A
N
b) Name all structures in a nephron which are normally present in...(Solved)
Shown below is a section through the mammalian nephron.
a) Name the structures labelled:
A
N
b) Name all structures in a nephron which are normally present in the cortex region of kidney.
c) Which region in the nephron deals with conservation of body water.
d) Name one hormone that has an effect on part labelled X.
e) How is part labelled N adapted to its function.
Date posted: May 27, 2019. Answers (1)
- The flow chart below represents a feeding relationship in an ecosystem.
a) Name two organisms which are both secondary and tertiary consumers.
b) State two short...(Solved)
The flow chart below represents a feeding relationship in an ecosystem.
a) Name two organisms which are both secondary and tertiary consumers.
b) State two short term effects of immigration of insects in the ecosystem.
c) Name the organism which has the least Biomass in the food web. Explain.
d) State the role of the following in an ecosystem:
i. Saprophytes
ii. Leguminous plants.
e) Name one method that would be used to estimate the fish population in the ecosystem.
Date posted: May 27, 2019. Answers (1)
- The diagram below represents a flower.
a) Name the parts labelled X and Y
X
Y
b) Describe the ovary position.
c) i) Suggest an agent of pollination...(Solved)
The diagram below represents a flower.
a) Name the parts labelled X and Y
X
Y
b) Describe the ovary position.
c) i) Suggest an agent of pollination of the flower above.
ii. Give a reason for your answer above.
d) In the flower above its sepals cell was found to have 20 chromosomes. What would be the number of chromosomes
found in the endosperm cell of the flower embryo sac after fertilization?.
Date posted: May 27, 2019. Answers (1)
- The diagram below shows a family tree. Squares represent males and circles representfemales. Normal individuals are indicated by unshaded squares and circles. Individuals who show...(Solved)
The diagram below shows a family tree. Squares represent males and circles representfemales. Normal individuals are indicated by unshaded squares and circles. Individuals who show genetically controlled defects are indicated by shaded squares and circles.
a) What is the name given to this type of a family tree?
b) In which of the grandparents is the genetically controlled defects likely to have developed and by what process.
c) Assume the genetically controlled defect was haemophilia,show the genotype of the following:
i. Grandparents
ii. The two couples
iii. The children of the couple that shoed the defect.
iv. What are the symptoms of the defect.
v. What is the remedy?
Date posted: May 27, 2019. Answers (1)
- What is meant by double fertilization in flowering plants.(Solved)
What is meant by double fertilization in flowering plants.
Date posted: May 27, 2019. Answers (1)
- Name two kinds of nuclei found in a mature pollen grain.(Solved)
Name two kinds of nuclei found in a mature pollen grain.
Date posted: May 27, 2019. Answers (1)
- Why is excretion of nitrogenous wastes more of a problem to animals than plants.(Solved)
Why is excretion of nitrogenous wastes more of a problem to animals than plants.
Date posted: May 27, 2019. Answers (1)
- State the reason behind the addition of iodine solution, to an onion epidermis on a slide while being observed on alight
microscope.(Solved)
State the reason behind the addition of iodine solution, to an onion epidermis on a slide while being observed on alight
microscope.
Date posted: May 27, 2019. Answers (1)
- Name the hormone responsible for:
a) Conversion of glycogen to glucouse
b) Regulation of the amount of water in the blood(Solved)
Name the hormone responsible for:
a) Conversion of glycogen to glucouse
b) Regulation of the amount of water in the blood
Date posted: May 27, 2019. Answers (1)