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Test: Transport in Plants (Old NCERT) - ACT MCQ


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25 Questions MCQ Test - Test: Transport in Plants (Old NCERT)

Test: Transport in Plants (Old NCERT) for ACT 2024 is part of ACT preparation. The Test: Transport in Plants (Old NCERT) questions and answers have been prepared according to the ACT exam syllabus.The Test: Transport in Plants (Old NCERT) MCQs are made for ACT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Transport in Plants (Old NCERT) below.
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Test: Transport in Plants (Old NCERT) - Question 1

Transport of water and mineral in plants take place through

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 1

Transport of water and mineral in plant take place through xylem tissue present in vascular bundles. Vessels and tracheids are main water conducting elements of xylem.

Test: Transport in Plants (Old NCERT) - Question 2

The molecules which move from higher to lower regions are called as

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 2

In diffusion, molecules move in a random fashion, the net result being substances moving from regions of higher concentration to regions of lower concentration.

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Test: Transport in Plants (Old NCERT) - Question 3

Pinus seeds cannot germinate without

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 3

The fungus provides minerals and water to the roots, inturn the roots provide sugars and N-containing compounds to themycorrhizae. Some plants have an obligate association with themycorrhizae.

Test: Transport in Plants (Old NCERT) - Question 4

Stomata close down if relative humidity of atmosphere falls below

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 4

Relative humidity of atmosphere also influencetheopening and closing of stomata. If relative humidity of atmosphere comes below 50% stomata close down.

Test: Transport in Plants (Old NCERT) - Question 5

In plants, capillarity is aided by the small diameter of

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 5

In plants capillarity is aided by the small diameter of the tracheary elements – the tracheids and vessel elements.

Test: Transport in Plants (Old NCERT) - Question 6

The ingredient not used for preserving food stuff is

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 6

For preserving food stuff vinegar, salt and sugar is used. Ethanol is antiseptic in nature but not used for preserving food stuff.

Test: Transport in Plants (Old NCERT) - Question 7

Root hairs absorb water from soil with the help of

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 7

Osmotic Pressure is the right option. As because roots need water for transportation. They dont have water at first but the surrounding soil does have. So, due to hypertonic state, roots absorb water by osmosis.

Test: Transport in Plants (Old NCERT) - Question 8

ψp denotes to

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 8

Pressure potential is usually positive, though in plants negative potential or tension inthe water column in the xylem plays a major role in water transport up a stem. Pressure potential is denoted as ψp.

Test: Transport in Plants (Old NCERT) - Question 9

Cohesion-tension theory is related

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 9

The process of movement of water and minerals from roots to leaves in plant through xylem tissues is called ascent of sap. The most accepted theory of ascent of sap is cohesion-tension theory

Test: Transport in Plants (Old NCERT) - Question 10

The flow of water upward through the xylem in plants can achieve fairly high rates up to 15 m height

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 10

The flow of water upward through the xylem in plants can achieve fairly high rates, up to 15 metres per hour. The water is mainly pulled through the plant and that the driving force for this process is transpiration from the leaves. This is referred to as the cohesion-tension-transpiration pull model.

Test: Transport in Plants (Old NCERT) - Question 11

Water molecules are attracted to each other in the liquid phase more than to water in the gas phase

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 11

Water molecules are attracted to each other in the liquid phase more than to water in the gas phase due to surface tension.

Test: Transport in Plants (Old NCERT) - Question 12

Main function of lenticel is

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 12

The lenticels functions as a pore, providing a pathway for the direct exchange of gases between the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases.The lenticels help in the gaseous exchange between the atmosphere and the internal tissue of the stem. The lenticels also helps in transpiration called as the lenticular transpiration.Lenticels are a portions of periderm with numerous intercellular spaces and loosely organized cells

Test: Transport in Plants (Old NCERT) - Question 13

Some carrier proteins allow diffusion by both molecules cross the membrane in the same direction is

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 13

Some carrier or transport proteins allow diffusion only if two types of molecules move together. In a symport, both molecules cross the membrane in the same direction.

Test: Transport in Plants (Old NCERT) - Question 14

Water potential of pure water and its solution are

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 14

The water potential of pure water at standard temperatures, which is not under any pressure, is taken to be zero. If some solute is dissolved in pure water, the solution has fewer freewater and the concentration of water decreases, reducing its water potential.

Test: Transport in Plants (Old NCERT) - Question 15

The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 15

The excess water collects in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbaceous parts. Such water loss in its liquid phaseis known as guttation.

Test: Transport in Plants (Old NCERT) - Question 16

The ratio of number of stomata to the total number of epidermal cells and stomata per unit leaf area is called

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 16

Stomatal index is the ratio of number of stomata to the total number of epidermal cells and stomata per unit area of leaf.

Test: Transport in Plants (Old NCERT) - Question 17

Various ions, and water from soil can be transported upto a small height in stems by

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 17

As various ions from the soil are actively transported into the vascular tissues of the roots, water follows (its potential gradient) and increases the pressure inside the xylem. This positive pressure is called rootpressure, and can be responsible for pushing up water to small heights.

Test: Transport in Plants (Old NCERT) - Question 18

In wall of guard cell, cellulose microfibrils are arranged

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 18

The cells surrounding the stomata pore is called guard cell. It is bean shaped in dicots and dumbbellshape in monocots. Cellulose microfibrils are arranged radially in guard cell.

Test: Transport in Plants (Old NCERT) - Question 19

The movement of diffusion is

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 19

Movement by diffusionis passive, and may be from one part of the cell tothe other, or from cell to cell, or over short distances, say, from the intercellularspaces of the leaf to the outside.

Test: Transport in Plants (Old NCERT) - Question 20

Passive water absorption by root system is due to

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 20

Absorption of water by root system is passive due to tension in sap created by transpiration. No energy molecule is required in this process, so it is passive in nature.

Test: Transport in Plants (Old NCERT) - Question 21

The neighbouring cells are connected through cytoplasmic strands that extend through

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 21

Neighbouring cells are connected through cytoplasmic strands that extend through plasmodesmata. During symplastic movement, the water travels through the cells – their cytoplasm; intercellular movement is through the plasmodesmata.

Test: Transport in Plants (Old NCERT) - Question 22

When separated by a semipermeable membrane, water enters the sugar solution. What would you call the sugar solution

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 22

When two solution are separated by a semipermeable membrane, water enters the sugar solution. Themovement of water always occurs from higher concentration to lower concentration. Such solution are called osmotically active.

Test: Transport in Plants (Old NCERT) - Question 23

The concentration of minerals in the soil is usually

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 23

The concentration of minerals in the soil is usually lower than the concentration of minerals in the root.

Test: Transport in Plants (Old NCERT) - Question 24

Special structures found on margins and tips of leaves made of parenchyma tissue and water pores through which guttation take place.

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 24

The margin and tips of leaves contain special structure made up of parenchyma tissues and water pores through which guttation take place is called hydathodes.

Test: Transport in Plants (Old NCERT) - Question 25

Diffusion rate is affected by

Detailed Solution for Test: Transport in Plants (Old NCERT) - Question 25

Diffusion rates are affected by the gradient of concentration, the permeability of the membrane separating them, temperature and pressure.

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