Answer the question with gaps for each questions
1. What is Nutrition?
2. What is the function of food?
3. What is Respiration?
4. What is the need for a transportation system in organisms?
5. What is Excretion?
6. What are the outside raw materials used by an organism?
7. What processes would you consider essential for maintaining life?
8. How do living things get their food?
9. What is the difference between autotrophic and heterotrophic nutrition?
10. What are Enzymes?
11. What is Photosynthesis?
12. What is the function of carbohydrates in the body?
Answers
Explanation:
hSolution 1
b) glucose formed in photosynthesis soon gets converted into starch
Question 2
The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is
a) six
b) twelve
c) eighteen
d) twenty-four
Solution 2
b) twelve
Question 3
The rate of photosynthesis is not affected by
a) light intensity
b) humidity
c) temperature
d) CO2 concentration
Solution 3
b) humidity
Question 4
Chlorophyll in a leaf is required for
a) breaking down water into hydrogen and oxygen
b) emitting green light
c) trapping light energy
d) storing starch in the leaves
Solution 4
c) trapping light energy
Question 5
If the rate of respiration becomes more than the rate of photosynthesis, plants will:
a) continue to live, but will not be able to store food
b) be killed instantly
c) grow more vigorously because more energy will be available
d) stop growing and die gradually of starvation
Solution 5
a) continue to live, but will not be able to store food
Question 6
Which one chemical reaction occurs during photosynthesis?
a) Carbon dioxide is reduced and water is oxidised
b) Water is reduced and carbon dioxide is oxidised
c) Both carbon dioxide and water are oxidised
d) Both carbon dioxide and water are reduced
Solution 6
a) Carbon dioxide is reduced and water is oxidised
Question 7
The specific function of light energy in the process of photosynthesis is to
a) reduce carbon dioxide
b) synthesise glucose
c) activate chlorophyll
d) split water molecule
Solution 7
c) activate chlorophyll
Question 8
A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
a) remove chlorophyll from leaves
b) remove starch from the leaves
c) ensure that no photosynthesis occurred
d) ensure that the leaves are free from starch
Solution 8
d) ensure that the leaves are free from starch
Question 9
During photosynthesis, the oxygen in glucose comes from
a) CO2
b) water
c) both CO2 and water
d) oxygen via air
Solution 9
a) CO2
Question 10
Name the following:
(a) The category of organisms that prepare their own food from basic raw materials.
(b) The kind of plastids found in the mesophyll cells of the leaf.
(c) The compound which stores energy in the cells.
(d) The first form of food substance produced during photosynthesis.
(e) The organisms that can be called "natural purifiers" of the air.
(f) The source of carbon dioxide for aquatic plants.
(g) The part of chloroplast where the dark reaction of photosynthesis takes place.
(h) The tissue that transports manufactured type of starch from leaves to all parts of the plants.
Solution 10
(a) Producers / Autotrophs
(b) Chloroplasts
(c) ATP (Adenosine triphosphate)
(d) Glucose
(e) Green plants
(f) Carbon dioxide dissolved in water
(g) Stroma
(h) Phloem
Answer:
1) nutrition is a process of intake of nutrients by an organism as well as the utilisation of these nutrients by the organism.
2) food is kind of fuel which provides energy to our body for various activities.
3) the process of releasing energy from food is called respiration.
4)we need a transpot system to deliver oxygen , nutrients and other substances to all our body cells and take away waste products from them.
5) the process in which the undigested food is removed from the body, is called excretion.
6) food , oxygen , water etc.are the outside raw materials used by an organism.
7) the various process essential for maintaining life are: nnutrition , respiration , transportation , excretion , control and coordination.