Photosynthesis 101
What is photosynthesis?
The process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar (glucose).
Plants do not make their own food.
False
List one external adaptation of the leaf.
A. It's has a large surface area
B. It's thin
D. It has a cuticle
E. Network of veins
What part of the plant does photosynthesis takes place?
The leaf
A plant is kept in darkness for several days. What happens to its rate of photosynthesis?
It falls greatly or stops while the plant lacks light.
The function of the leaf is to ______ for photosynthesis?
Absorb light and carbon dioxide
Plants use carbon dioxide during photosynthesis.
True
The network of veins help with _________ ?
Transportation of water and sugar.
What tiny openings in leaves allow gas exchange?
Stomata
What gas would you expect a healthy aquatic plant to release in bright light?
Oxygen
Photosynthesis provides _______ for humans?
Oxygen and food
Photosynthesis releases oxygen into the surroundings.
True
How does the leaf being flat and broad help with photosynthesis?
It provides a large surface area for light absorption.
The role of the cuticle is to?
Prevent the loss of water
Plant A (receive water, carbon dioxide) was placed in a dark room receiving while plant B (receive water, sunlight, carbon dioxide) was left outdoors. A starch test was done using iodine with the leaves from each plants .
Which plant will indicate the presence of starch and why.
Plant B- all the materials needed for photosynthesis was present. The leaf will change to blue-black, indicating that photosynthesis occured.
What are the end products of photosynthesis?
Oxygen and sugar (glucose)
Most photosynthesis happens in the roots of a green plant.
False
Which organelle is the main site of photosynthesis in the leaf?
Chloroplast
The spongy mesophyll is _______?
Loosely packed
Distance from light source: Plant A (10cm), Plant B (20cm), Plant C (30cm)
Which plant would show greater signs of photosynthesis and why
Plant A : It's closer to the light source hence it's receiving more light energy. The further away from the light source the lower the rate of photosynthesis.
Write the worded equation for photosynthesis.
Carbon dioxide + water = Glucose + Oxygen
(light)
A plant can photosynthesize faster without limit just by increasing light intensity.
False.
Carbon dioxide and water also contribute to the process of photosynthesis
The green pigment responsible for trapping light is called?
Chlorophyll
Chlorophyll is found in which mesophyll cell the most?
Palisade Mesophyll Cell
A plant gets plenty of light and water. What may limit photosynthesis?
The absence of carbon dioxide.