Biology 2 (Essay) 8:30 am - 10:10 am
Biology 1 (Obj) 10:10am - 11:00am
Section A
1a
i blood- tissue level
ii guinea pig- organism
iii hibiscus flower- organ
Iv human skeleton- tissue
V plasmodium- cell
1a
i blood- tissue level
ii guinea pig- organism
iii hibiscus flower- organ
Iv human skeleton- tissue
V plasmodium- cell
1b
Homeostasis can be defined as the process whereby organisms keep conditions in their internal environment fairly constant.
Homeostasis can be defined as the process whereby organisms keep conditions in their internal environment fairly constant.
1c
(I) the kidney is an excretory organ. It carries out the maintenance of acid-base balance in the body. It does this due to its contact with the body. It reduces acid from the body when it is too high and add base when too low.
(I) the kidney is an excretory organ. It carries out the maintenance of acid-base balance in the body. It does this due to its contact with the body. It reduces acid from the body when it is too high and add base when too low.
(ii)a Temperature: when the temperature in the environment is very high,there is more sweat and less urination. Therefore , on a cold day the kidney performs more and on a hot day,kidney works less.
(ii)b Disease: the kidney functions can also be affected by variety of diseases. There are kidney stones, diuresis, nephritis, oedema.
(ii)b Disease: the kidney functions can also be affected by variety of diseases. There are kidney stones, diuresis, nephritis, oedema.
2a
6CO2+6H2O sunlight/chlorophyl C6H12O6+6O2
6CO2+6H2O sunlight/chlorophyl C6H12O6+6O2
2b
draw your diagram.
draw your diagram.
2c
i. It carries out deamination
ii. It regulates blood sugar
iii. It is a reservoir for blood
iv. Its aids digestion by producing bile
v. It produces and destroys red blood cells in foetus and adult respectively.
i. It carries out deamination
ii. It regulates blood sugar
iii. It is a reservoir for blood
iv. Its aids digestion by producing bile
v. It produces and destroys red blood cells in foetus and adult respectively.
3a
Draw the soil profile yourself.
Draw the soil profile yourself.
3b
Clay.
-it is very acidic
-it is a heavy soil
-it does not support growth of crops
-the particles are tightly bound together.
Clay.
-it is very acidic
-it is a heavy soil
-it does not support growth of crops
-the particles are tightly bound together.
Sandy.
-it is easily heated up during the day
-it has poor mineral holding capacity
-it is low in organic matter.
-it is easily heated up during the day
-it has poor mineral holding capacity
-it is low in organic matter.
6A)
i)-Intraspecific competition
-Interspecific competition
ii)-teritotry
-food
-water
-gases
iii)
b)
-Transpiration
-Cutation
-Sweating
c)
(i)Fluid feeders;mosquito,tsetse fly
(ii)Filter feeders;duck,humming bird
i)-Intraspecific competition
-Interspecific competition
ii)-teritotry
-food
-water
-gases
iii)
b)
-Transpiration
-Cutation
-Sweating
c)
(i)Fluid feeders;mosquito,tsetse fly
(ii)Filter feeders;duck,humming bird
6d)
-Cornfield layer;(i)It protect the skin from mechanical injury
(ii)Homeostasis
-Air erector muscle;(i)It maintains body temperature
(ii)It maintains the streamliness of the body
-Sebaceous gland;(i)It lubricates the hair
(ii)It produces serum that has anti-microbial effect
e)
-Increase in birt[Receiving Text]uces abortion
-Prevent overpopulation
-Improves child mother care
-Cornfield layer;(i)It protect the skin from mechanical injury
(ii)Homeostasis
-Air erector muscle;(i)It maintains body temperature
(ii)It maintains the streamliness of the body
-Sebaceous gland;(i)It lubricates the hair
(ii)It produces serum that has anti-microbial effect
e)
-Increase in birt[Receiving Text]uces abortion
-Prevent overpopulation
-Improves child mother care
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