Class 7: Transportation in Plants
Medium-difficulty multiple-choice quiz based on the lesson 'Transportation in Plants' covering roots, xylem, phloem, photosynthesis, and transpiration.
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Quiz Questions & Answers
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Question 1: What is the primary function of root hairs as described in the lesson?
They increase the surface area to absorb water and nutrients from soil.
They carry sugars from leaves to roots.
They perform photosynthesis for the plant.
They store large amounts of food for winter use.
Question 2: Which tissue is described as a network of tube-like vessels that connects roots to leaves and transports water and dissolved nutrients?
Xylem
Cortex
Epidermis
Phloem
Question 3: According to the lesson, how does phloem differ in function from xylem?
Phloem transports water and xylem transports air.
Phloem transports sugars made in leaves to the rest of the plant, while xylem moves water upward.
Phloem stores water and xylem stores sugars.
Both phloem and xylem do the exact same job.
Question 4: Which two raw materials do leaves use to make food during photosynthesis as stated in the lesson?
Sugar and oxygen
Nitrogen and sunlight
Oxygen and soil minerals
Carbon dioxide and water
Question 5: Transpiration was described as a process that helps keep leaves cool. What specifically happens during transpiration?
Roots pump cool fluid up to the leaves actively.
Leaves吸 absorb more sunlight to lower temperature.
Stomata close permanently to trap water inside leaves.
Water vapor evaporates from leaves and stems into the atmosphere.
Question 6: The lesson mentions small pores on the underside of leaves that facilitate transpiration. What are these pores called?
Xylem pores
Stomata
Lenticels
Phloem gaps
Question 7: Given the roles described, which scenario best explains why a plant would wilt if roots can't reach water?
Leaves stop photosynthesis because stomata turn into root hairs.
Xylem reverses direction to send water back to roots.
Without water uptake by root hairs, xylem cannot supply leaves, reducing turgor and causing wilting.
Phloem will stop making sugars so leaves fall off immediately.