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Because they need the presence of chlorophll in them

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Q: Why must leaves be exposed to sunlight for some time before testing for starch?
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Related questions

What will be the color of leaves of a plant not exposed to sunlight?

yellow/brown


Is it true that the chlorophyll is found in the leaves?

Yes, chlorophyll is only found in leaves as it is the only place where they are fully exposed to sunlight.


Is it true that chlorophyll is only found in the leaves?

Yes, chlorophyll is only found in leaves as it is the only place where they are fully exposed to sunlight.


Why does photosynthesis occur in leaves?

Photosynthesis needs sunlight to occur. Therefore photosynthesis does not occur in the roots because they do not receive any sunlight. The leaves are the parts of the plant most exposed to the light.


Why leaves inside cabbage are paler?

Leaves on the inside of the head do not receive direct sunlight, and have very little chlorophyll. Outer leaves are exposed to direct light.


Why does leaves with oil on both sides become gold in color?

because it is not exposed to sunlight and the oil blockens away the stomata by being entered on the leaves.


What type of leaf would be best suited to a very sunny climate and why?

smaller leaves, as less surface area is needed for photosynthesis if exposed to larger amounts of sunlight. For example, if you compare geranium leaves on identical plants, some in strong steady sunlight, others in shade: The leaves in the shade will grow larger than those on plants in sunlight.


Why do leaves face upward?

Leaves face upward to maximize the surface area exposed to sunlight for photosynthesis. This allows the plant to capture more sunlight and produce more energy for growth and development. Additionally, this orientation helps reduce the chance of water loss through transpiration.


What part of the plant collects the sunlight that is used for photosynthesis?

The chlorophyll is a part of the leaf cell that absorbs sunlight that is then turned into glucose through the transaction of photosynthesisLeaf


What would most like happen if green plants where exposed to less sunlight?

The plants will tend to grow lanky and weak, while the leaves will turn yellowish.


Do leaves matter when you are planting a plant?

It is a good idea to plant it in such a way that the leaves are above ground, so that they are exposed to sunlight and can perform their function. However, plants are very flexible organisms, and if you do happen to bury some leaves, the plant will probably suffer no real harm.


What will happen if a root hair cell is exposed to sunlight?

the inner delicate tissues will dry up hence the plant leaves shrinking due2 no transport of water and mineral salt.