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Questions and Answers
What is primarily absorbed by plants through their roots?
What is primarily absorbed by plants through their roots?
- Oxygen
- Water and minerals (correct)
- Carbon dioxide
- Sunlight
Glucose produced by photosynthesis only moves up to the growing bud.
Glucose produced by photosynthesis only moves up to the growing bud.
False (B)
What role does water play in plants?
What role does water play in plants?
It is essential for photosynthesis and transpiration.
The roots of a plant provide _____ to anchor the plant to the soil.
The roots of a plant provide _____ to anchor the plant to the soil.
Match the following functions with their corresponding components of the plant:
Match the following functions with their corresponding components of the plant:
Which of the following is NOT a function of plant roots?
Which of the following is NOT a function of plant roots?
Water is absorbed mainly from the atmosphere by plant roots.
Water is absorbed mainly from the atmosphere by plant roots.
Glucose produced during photosynthesis is transported from the _____ to the growing parts of the plant.
Glucose produced during photosynthesis is transported from the _____ to the growing parts of the plant.
What is the primary role of stomata in plants?
What is the primary role of stomata in plants?
The stomata remain open during the night to facilitate transpiration.
The stomata remain open during the night to facilitate transpiration.
What happens to excess heat during the transpiration process?
What happens to excess heat during the transpiration process?
Transpiration helps in the absorption of ______ from the soil.
Transpiration helps in the absorption of ______ from the soil.
During which time of day do stomata help with absorption and transportation?
During which time of day do stomata help with absorption and transportation?
Match the following terms with their definitions:
Match the following terms with their definitions:
High intensity of light decreases the duration of transpiration.
High intensity of light decreases the duration of transpiration.
What role does transpiration play in a plant's growth?
What role does transpiration play in a plant's growth?
What is the purpose of tying a polythene bag around the potted plant?
What is the purpose of tying a polythene bag around the potted plant?
The cobalt chloride paper turns pink when exposed to drier conditions.
The cobalt chloride paper turns pink when exposed to drier conditions.
What is labeled as jar 'A' in the experiment?
What is labeled as jar 'A' in the experiment?
The plant is placed in sunlight for ___ hour(s).
The plant is placed in sunlight for ___ hour(s).
Match the following components with their descriptions:
Match the following components with their descriptions:
What is the main process observed in the potato experiment?
What is the main process observed in the potato experiment?
The potato is placed entirely in water during the experiment.
The potato is placed entirely in water during the experiment.
What happens to the level of the sugar solution in the potato cup after some time?
What happens to the level of the sugar solution in the potato cup after some time?
Water moves from an area of __________ concentration to an area of __________ concentration during osmosis.
Water moves from an area of __________ concentration to an area of __________ concentration during osmosis.
Match each term with its correct definition:
Match each term with its correct definition:
Why is the membrane of the potato considered selectively permeable?
Why is the membrane of the potato considered selectively permeable?
Root hairs increase the number of points through which water is absorbed.
Root hairs increase the number of points through which water is absorbed.
What initial action is taken when preparing the potato for the experiment?
What initial action is taken when preparing the potato for the experiment?
Which micronutrient deficiency causes yellowing of leaves (chlorosis)?
Which micronutrient deficiency causes yellowing of leaves (chlorosis)?
Phloem transport is unidirectional.
Phloem transport is unidirectional.
What is required by every cell for respiration?
What is required by every cell for respiration?
____________ form a continuous column from leaves to other parts of plants.
____________ form a continuous column from leaves to other parts of plants.
Which macronutrient deficiency is characterized by delayed seed germination and poor root growth?
Which macronutrient deficiency is characterized by delayed seed germination and poor root growth?
Transport of food from leaves to other parts of plants is called __________.
Transport of food from leaves to other parts of plants is called __________.
Match the deficiency with its corresponding symptoms:
Match the deficiency with its corresponding symptoms:
Food can be stored only in leaves.
Food can be stored only in leaves.
Study Notes
Absorption of Water by Roots
- Roots absorb water through their entire surface.
- Since most water is available in the soil, plants developed a well-developed root system.
- Roots perform several functions, including:
- Anchoring the plant to the soil
- Storing food and other nutrients
- Water and minerals are taken up by the roots.
- Water plays an important role in:
- Carrying out life processes like photosynthesis and transpiration.
- Transporting minerals to all parts of the plant.
- Keeping the plant body turgid.
Transpiration
- Transpiration is the loss of water from the plant through leaves.
- Transpiration occurs mainly through stomata.
- Factors influencing transpiration include:
- Light: stomata open during the day and close at night, leading to more transpiration during the day.
- Temperature: high temperatures cause increased transpiration.
- Humidity: low humidity increases the rate of transpiration.
- Transpiration helps:
- Transporting water and minerals to all parts of the plant.
- Keeping the plant body cool.
Osmosis
- Osmosis is the movement of water molecules across a semipermeable membrane from a region of higher concentration to a region of lower concentration.
- Demonstrated by placing a potato in a sugar solution:
- Water moves from the glass beaker (lower concentration) to the potato (higher concentration) through the potato's semipermeable membrane, causing the sugar solution level to increase.
Nutrient Deficiencies
- Plants require nutrients for proper growth and development.
- Deficiencies in specific nutrients can lead to various symptoms:
- Iron deficiency: Yellowing of leaves (chlorosis)
- Manganese deficiency: Yellowing of leaves with grey spots (chlorosis)
- Zinc deficiency: Malformed leaves, yellowing of leaves, stunted plant growth
- Nitrogen deficiency: Yellowing of leaves, retarded growth, wrinkling of cereal grains
- Phosphorus deficiency: Delay in seed germination, poor root growth, purple and red spots on leaves
- Potassium deficiency: Poor and stunted growth
Transport in Plants
- Phloem:
- Transports food from leaves to other parts of the plant.
- The process is called translocation.
- Phloem transport is bidirectional.
- Xylem:
- Transports water and dissolved minerals upwards from roots to leaves.
- Xylem transport is unidirectional.
- Sieve tubes are part of the phloem and assist companion cells in transporting food.
- Glucose is formed in palisade cells of leaves.
- Stomata form a continuous column from leaves to other parts of the plant.
- Meristematic tissue is made up of sieve tubes and companion cells.
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Description
This quiz explores the processes of water absorption by roots and transpiration in plants. Learn about how roots function and understand the factors that influence transpiration. Test your knowledge of plant biology concepts related to water uptake and loss.
