Absorption by roots

Question 1

An apparatus that measures the rate of uptake of water in a cut shoot due to transpiration

Answer 1

Potometer

Question 2

Exudation of sap from the injured part of the leaf

Answer 2

Bleeding

Question 3

Permanently open searchers seen on the bark of an old woody stem

Answer 3

Lenticels

Question 4

Kidney shaped structure present in stomata

Answer 4

Guard cell

Question 5

Loss of water from the aerial parts of the plant

Answer 5

Transpiration

Question 6

Function of sunken stomata

Answer 6

To reduce rate of transpiration

Question 7

Function of leaf spines

Answer 7

Leaf spines helps to reduce the transpiration

Question 8

Function of waxy cuticle

Answer 8

Helps to reduce transpiration rate

Question 9

Function of guard cells

Answer 9

Helps to open and close stomata

Question 10

Function of hydathodes

Answer 10

Removal of excess in form of water droplets

Question 11

Function of stomata

Answer 11

Transpiration and respiration

Question 12

Function of lenticels

Answer 12

Exchange gases in lower stems

Question 13

Location of guard cells

Answer 13

Found around stomata in the epidermis of the leaf

Question 14

Location of stoma

Answer 14

Epidermis of the leaves

Question 15

Location of Lenticels

Answer 15

Older stems

Question 16

Location of hydathodes

Answer 16

Located along the margin of leaves

Question 17

Structure of hydathodes and stomata are ________________

Answer 17

Different

Question 18

Loss of excess water in the form of water droplets is called

Answer 18

Guttation

Question 19

List the three primary functions of root

Answer 19

Fixes the plant in soil giving it support.
Absorbs water and mineral nutrient from soil.
Conducts absorbed water and mineral to stem.

Question 20

Mention four purposes for which the plants need water

Answer 20

Photosynthesis
Transpiration
Transportation
Mechanical stiffness

Question 21

Where are the mineral nutrients mostly used in plants?

Answer 21

The mineral nutrients are used by plants in formation of cell and cell organelles as well as in synthesis of various compounds and enzymes.

Question 22

List three main characteristics of the roots that enable them to draw water from the soil

Answer 22

Surface area of roots is enormous.
Root hairs contain cell sap, of a higher concentration than that of the surrounding water.
Root hairs have thin walls.

Question 23

The hydrostatic pressure of the cell sap on the cell wall is called

Answer 23

Turgor pressure

Question 24

When a cell in solution shrinks and loses its shape, then the solution is

Answer 24

Hypertonic

Question 25

The process for which energy is required is

Answer 25

Active transport

Question 26

The highest water potential is that of

Answer 26

Pure water

Question 27

When the cells of a plant are fully distended, the condition is called

Answer 27

Deplasmolysis

Question 28

Which creates a suction force in plants

Answer 28

Transpiration

Question 29

The phenomenon by which living/dead plant cells absorb water by surface attraction is called

Answer 29

Imbibition

Question 30

Which of the following is a living semi-permeable membrane

Answer 30

Cell membrane

Question 31

Addition of salt to pickles is a method of killing the bacteria by

Answer 31

Plasmolysis

Question 32

Root pressure can be measured by using

Answer 32

Manometer

Question 33

The condition of a cell placed in a hypotonic solution.

Answer 33

Turgidity

Question 34

The process by which intact plants lose water in the form of droplets from leaf margins

Answer 34

Guttation

Question 35

The process by which water enters root hairs

Answer 35

Osmosis

Question 36

The tissue concerned with upward conduction of water in plants.

Answer 36

Xylem

Question 37

The term for the inward movement of solvent molecules through the plasma membrane of a cell

Answer 37

Endosmosis

Question 38

The process by which molecules distribute themselves evenly within the space they occupy.

Answer 38

Diffusion

Question 39

The pressure which is responsible for the movement of water molecules across the cortical cells of the root

Answer 39

Root pressure

Question 40

Root pressure

Answer 40

Turgor pressure

Question 41

The condition in which the cell contents are shrunken

Answer 41

Flaccidity