-
-
Solution
Food substance
Procedure
Observation
Conclusion
Solution X
Reducing sugars
(1/2)
Add equal amount of Benedict’s solution
to a test tube containing solution X and heat to boil.(1/2)The blue colour of iodine solution is retained;
Reducing sugars absent;
Solution Y
Reducing sugars (1/2)
Add equal amount of Benedict’s solution
to a test tube containing solution Y and heat to boil.(1/2)Colour turns to orange;
Reducing sugars present;
-
Solution
Food substance
procedure
observation
conclusion
Solution Y
Reducing sugars
Add equal amount of Benedict’s
solution to a test tube containing solution X and heat to boil.The blue colour of iodine solution is retained;
Reducing sugars present;
Solution X
Reducing sugars
Add equal amount of Benedict’s
solution to a test tube containing solution Y and heat to boilColour turns to orange
Reducing sugars present;
- diffusion;
- The reducing sugars in solution Y; diffused; from the beaker where it was highly concentrated into the visking tubing where it was less concentrated;
-
- Absorption of mineral salts from the soil;
- Absorption of digested foods and glucose from the ileum into the blood stream;
- Gaseous exchange;
- removal of nitrogenous wastes in some fresh unicellular organisns;
- Transport of manufactured food from leaves to other parts of the plants;
-
-
- Set 1 – normal conditions
Set E1 – in the dark
Set B – unidirectional light 3mks -
- Etiolation; 1mk
- To reach light for photosynthesis; 1mk
-
- Positive phototropism; 1mk
- Auxins migrate to the darker side causing faster growth/elongation on this side; resulting in curvature of the shoot towards the source of light; 2mks
-
- Set A1 – Epigeal; 1mk
Set M1 – hypogeal; 1mk - Set A1 – cotyledons brought above the ground; 1mk
Set M1 – cotyledons remain below the earth’s surface/ underground; 1mk
- Set A1 – Epigeal; 1mk
- Set 1 – normal conditions
-
- Arthropoda;
- X- Arachnida;
Y- Insecta;
Z- Crustacea; -
- Useful in plant pollination;
- Produce edible food eg. Honey and royal jelly;
-
- Transmits disease causing organisms/disease vector;
- Sucks blood hence can cause anemia; (any three)
- Bites on animals destroy the quality of hides and skins;
- Wounds created become avenues for secondary bacterial infection;
-
- Flight;……………………….presence of wings;
- Walking;…………………….presence of legs;
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