7th Grade > Biology
NUTRITION IN PLANTS MCQs
Total Questions : 117
| Page 5 of 12 pages
:
Each Name and category: 1 Mark
S.No
Name
Category
A.
Mushroom
Saprophytes
B.
Pitcher Plant
Insectivores
C.
Cuscuta
Parasites
D.
Rhizobium in root nodules
Symbionts
E.
Rosita
Insectivores
:
Definition: 1 Mark
Necessity: 1 Mark
Modes of nutrition: 1 Mark
The process bywhichorganismstakeinfood andutilize it is called as nutrition.
We need nutrients because they give us energy, and energy is needed for any organism to work, grow and reproduce.
The two modes of nutrition are:
1. Autotrophic
2. Heterotrophic
:
The green colour in autotrophic plants is due to a green pigment called chlorophyll. It harnesses sunlight necessary for photosynthesis.
:
Differences: 1 Mark each
S.No.AutotrophsHeterotrophs1They produce their own food through photosynthesis.They depend on autotrophs for nutrition.2They are usually green plants that contain chloroplasts.They are non-green plants that do not contain chloroplasts.3They depend on solar energy.They do not directly depend on solar energy.Examples:All green plantsAll animals
Answer: Option A. -> True
:
A
Nitrogen is present in abundance in gaseous form in the air. However, plants cannot absorb nitrogen in this form. Elemental nitrogen is converted into oxides of nitrogen bybacteria like Rhizobium, which can then be used by plants.
:
A
Nitrogen is present in abundance in gaseous form in the air. However, plants cannot absorb nitrogen in this form. Elemental nitrogen is converted into oxides of nitrogen bybacteria like Rhizobium, which can then be used by plants.
Answer: Option C. -> chloroplast
:
C
The organelle that helps in capturing sunlight is known as chloroplast. These chloroplasts contain chlorophyll, a green pigment, that captures sunlight in order to perform photosynthesis.
:
C
The organelle that helps in capturing sunlight is known as chloroplast. These chloroplasts contain chlorophyll, a green pigment, that captures sunlight in order to perform photosynthesis.
Answer: Option D. -> chemical energy
:
D
Photosynthesisis the process of converstion oflight energy to chemical energy. This chemical energy is stored in food. Photosynthesis occurs in green plants and algae. Plants needlight energy, CO2and H2Oto make sugar in the presence of chlorophyll. The process of photosynthesis takes place in thechloroplasts which contains chlorophyll.
:
D
Photosynthesisis the process of converstion oflight energy to chemical energy. This chemical energy is stored in food. Photosynthesis occurs in green plants and algae. Plants needlight energy, CO2and H2Oto make sugar in the presence of chlorophyll. The process of photosynthesis takes place in thechloroplasts which contains chlorophyll.
Answer: Option C. -> Leaves
:
C
Gases are exchanged in plants through small openings called stomata. Stomata ispresent mostly on the lower surface of leaves and on green stems. Each stoma has two bean-shaped cells called guard cells, which controls the opening and closing of the stomata.
:
C
Gases are exchanged in plants through small openings called stomata. Stomata ispresent mostly on the lower surface of leaves and on green stems. Each stoma has two bean-shaped cells called guard cells, which controls the opening and closing of the stomata.
Answer: Option B. -> host
:
B
The plant on which Cuscuta grows on for supportis called a host. Cuscuta is a parasitic plant which obtains its required nutrients from the host plant.
:
B
The plant on which Cuscuta grows on for supportis called a host. Cuscuta is a parasitic plant which obtains its required nutrients from the host plant.
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