Photosynthesis Flashcards
Why are plants known as autotrophs?
because the prepare their own food.
What does photosynthesis mean?
It literally means synthesis in the presence of light.
Define photosynthesis.
Photosynthesis is the process of preparing food using carbon dioxide and water in the presence of light.
Where does photosynthesis mostly occur?Does it occur anywhere else?
- In the leaves
- Yes, it may occur in the stem in some cases.
What do leaves contain?Where is “it” present?
- Chlorophyll in its cells.
- “It” is present in an organelle known as the chloroplasts.
Wht are the 2 main important roles of a leaf in photosynthesis?
- On the lower sides of the leaves, there are small pores, called the stomamta , which let the carbon dioxide enter.
- It consists of chlorophyll-containing cells.
Why is chlorophyll necessary?
Because it traps the energy from sunlight, without photosynthesis, chlorophyll does not take place.
What are the raw materials in photosynthesis?
- Carbon Dioxide- Is absorbed from the atmosphere through the stomamta , which is present on the lower surface of the leaf.
- Water-Absorbed fromthe soil through the root system.
- Chlorophyll-Present in the leaf.
- Light- from the Sun.
What is synthesised during photosynthesis?
Food , in the form of sugars, is synthesised and oxygen is realeased as a byproduct.
What is regarded as evidence of photosynthesis?
Presence of starch, a complex carbohydrate,.
What is the summary of photosynthesis?
Carbon dioxide+water———— carbohydrates, oxygen and water.
What are leaves of green plants described as?
chemical factories for producing food.
Leaves convert light energy to ________ by____________
chemical energy by synthesising carbohydrates.
How does a cactus produce photosynthesis?
Since the leaves are reduced to spines, it takes place in the stem.
What is a stomata?
Stomata are minute pores in the surface of a leave, they are abundant in the lower surface of the leaf, so as to control the rate of transpiration.
