Exam (elaborations)
Biology term year 9 term 1 Questions With Complete Solutions
- Course
- Biology.
- Institution
- Arizona State University
Biology term year 9 term 1 Questions With Complete Solutions
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Biology term year 9 term 1What is photosynthesis?
A process by which plants make their own food using light energy.
What are the food products that plants make?
1.Glucose/carbohydrates
2.Protiens
3.Oils
4.Vitamins
Brainpower
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What organism other than plants can photosynthesize?
Algae
What do chloroplasts contain?
A green substance called chlorophyll.
What is chlorophyll?
A green pigment found in the chloroplasts of plants, algae, and some
bacteria.
What is the word equation for photosynthesis?
Carbon dioxide + water --light--> glucose + oxygen
What is the word equation for photosynthesis in symbols?
(6)CO2 + (6)H2O -----> C6H12O6 + (6)O2
What are the raw materials of photosynthesis?
carbon dioxide and water
What are stomata and what do they do?
, What is osmosis and how does it work?
Osmosis is a type of diffusion. It is when the concentration of water in a cell
and outside of a cell is different (not equal). So, water moves to equalize
the concentration. Osmosis works in the same way as diffusion, but within
and outside of a cell. Osmosis occurs in both plant and animal cells.
What are root hair cells?
Cells on the surface of plant roots, which grow into long "hairs" that stick
out into the soil.
What are the conditions for photosynthesis?
- proper wavelengths of light
- carbon dioxide
- proper temperatures
- water supply
What are the two main products of photosynthesis?
glucose and oxygen
What can glucose formed during photosynthesis be converted to?
-Starch
-Cellulose
-Proteins
-Lipids
Where does the oxygen go after it is formed?
It diffuses out of the plant through the stomata
What is the importance of photosynthesis?
1. Release of oxygen-which is utilized by other organisms.
2.Make food products-carbohydrates, proteins &lipids which are eaten by
other animals.
3.Maintain the levels of CO2 &O2 in the atmosphere.
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