-Destruction of the tender blood vessels of the foetus due to higher blood pressure of the maternal circulation.
-Agglutination of foetal red blood cells due to incompatible blood groups of mother and foetus, both A BO and Rhesus
antigen;
-Transfer of pathogens from blood of mother into foetus is likely;
-Waste products in the maternal blood will also get into foetal circulation; Their concentration may prove too high for the
foetus;
sharon kalunda answered the question on May 27, 2019 at 09:02
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a) Identify the stage.
b) Give a reason for your answer in (a) above....(Solved)
The diagram below shows a cell undergoing a stage in a cell division.
a) Identify the stage.
b) Give a reason for your answer in (a) above.
Date posted: May 27, 2019. Answers (1)
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a) Construct a pyramid representing representing the order of feeding in the grassland.
b) Describe two features...(Solved)
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b) Describe two features expected along trophic levels of pyramid constructed.
Date posted: May 27, 2019. Answers (1)
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a) Identify two mistakes in the name above.
b) Write the correct name of cockroach.(Solved)
A student named cockroach as AMERICAN PERIPLANTA.
a) Identify two mistakes in the name above.
b) Write the correct name of cockroach.
Date posted: May 27, 2019. Answers (1)
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i) Name the kingdom to which the organism belong.
ii) Give a reason for your answer in a (i) above.(Solved)
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i) Name the kingdom to which the organism belong.
ii) Give a reason for your answer in a (i) above.
Date posted: May 27, 2019. Answers (1)
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Explain why;
i) There are no plasma proteins in the urine.
ii) Urea...(Solved)
The table below shows percentage composition of blood plasma and urine from different substances.
Explain why;
i) There are no plasma proteins in the urine.
ii) Urea concentration is greater in the urine than in the blood plasma.
iii) There is glucose in the urine
Date posted: May 27, 2019. Answers (1)
- Name the main nitrogenous wastes excrete by:
a) Birds
b) Shark
c) Cow(Solved)
Name the main nitrogenous wastes excrete by:
a) Birds
b) Shark
c) Cow
Date posted: May 27, 2019. Answers (1)
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In an experiment to measure gaseous exchange between flying locust and its surrounding it was found that for every 1cm3 of carbon (IV) oxide, 1.43cm3 of oxygen was consumed.
a) Calculate the respiratory quotient forthe food substance that was being oxidised.
b) State the importance of respiratory quotient.
Date posted: May 27, 2019. Answers (1)
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Explain why it is not possible to drown a locust while holding its head under water.
Date posted: May 27, 2019. Answers (1)
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Differentiate between O+ and O- blood group.
Date posted: May 27, 2019. Answers (1)
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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)
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Name the substances:A,B and C.
Date posted: May 27, 2019. Answers (1)
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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)
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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)
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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)