Page 18 - Ranger PT3 2022 science

Science PT3 Chapter 2 Cell as the Basic Unit of Life

Results:
Leaf Starch test Inference
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Covered by black Brown (No change) Photosynthesis did not occur
paper
Not covered by black Dark blue Photosynthesis occurred
paper

(c) Presence of water
Variables:
Manipulated: Presence of water Form 1
Responding: Presence of starch
Constant: Presence of carbon dioxide,
Form 1
sunlight, and chlorophyll
A B
Results:
Plant Starch test Inference
Watered Dark blue Photosynthesis occurred
Not watered Brown (No change) Photosynthesis did not occur

(d) Presence of chlorophyll
Variables:
Manipulated: Presence of chlorophyll Green part
of leaf
Responding: Presence of starch Non-green
Constant: Presence of carbon dioxide, water, and part of leaf
sunlight

Results:
Leaf Starch test Inference
Part of leaf that is green Dark blue Photosynthesis occurred
(has chlorophyll)
Part of leaf that is not green Brown (No change) Photosynthesis did not
(has no chlorophyll) occur

7. The importance of photosynthesis includes:
(a) Oxygen that is released during the process of photosynthesis is used by other
organisms for breathing and cellular respiration.
(b) Supplies the source of glucose to all organisms.
(c) Maintains and balances the content of oxygen and carbon dioxide gases in the
atmosphere.

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