Free Tissues 03 Practice Test - 9th Grade 

Question 1

Aerenchyma cells are parenchymatous with air spaces between them.

A. True
B. False

SOLUTION

Solution : A

Aerenchyma is a special type of parenchyma tissue present in aquatic plants. They consists of a network of parenchyma cells which enclose large air cavities. These air cavities store gases. This makes the plant light and provides buoyancy.
 

Question 2

Which among the following is the function of guard cells?

A.

Opening and closing of stomata

B.

Production of antioxidants

C.

Protection

D.

Transmission of spores

SOLUTION

Solution : A

Guard cells are kidney shaped cells that surrounds the stomata. They control the opening and closing of the stomata. When the plant has an excess of water, the guard cells swell and create an opening for the exchange of gases. In dry conditions, the guard cells are flat and keep the stomata closed, inhibiting exchange of gases.

Question 3

Which of the following tissues are correctly matched to their function?

A. Blood - Protection against infection
B. Muscles - Transmission of neural signals
C. Nerve fibers - Movement and locomotion
D. Bones - Protection of vital parts

SOLUTION

Solution : A and D

 ∙ Blood is a fluid connective tissue. The fluid component of blood is called plasma, while the cellular components consists of RBCs, WBCs and platelets. WBCs help to protect the body against infections.
 ∙ Muscular tissues help in voluntary movement (e.g. walking) and involuntary movement (e.g. peristalsis).
 ∙ Nerve fibres pass on information by transmitting electrical signals.
 ∙ Bones are connective tissue which provide the skeletal framework and protect vital organs of the body.

Question 4

Which among the following are the components of xylem tissue?

A. Xylem fibres
B. Companion cells
C. Vessels
D. Tracheids

SOLUTION

Solution : A, C, and D

Xylem is a complex permanent plant tissue. It is involved in conduction of minerals and water from roots to other parts of the plant. It consists of xylem vessels, xylem tracheids, xylem fibres and xylem parenchyma. Whereas, phloem consists of sieve tubes, companion cells, phloem fibres and phloem parenchyma.

Question 5

Xylem is unidirectional, whereas, phloem is bidirectional.

A. True
B. False

SOLUTION

Solution : A

Xylem and phloem are two conducting tissues present in plants. Phloem transports food material from leaves to other parts of the plant body. It can conduct food in both directions. Xylem conducts minerals and water only in the upward direction i.e., from roots towards the stem.

Question 6

Tissue present below the skin epidermis which acts as an insulating layer is known as ___.

A.

areolar tissue

B.

adipose tissue

C.

nervous tissue

D.

muscular tissue

SOLUTION

Solution : B

Adipose tissue is present below the skin and between internal organs. It is a fat storing connective tissue. This layer acts as an insulating layer and shock absorber, protecting the internal organs.

Question 7

Blood is an example of ________ .

A. fibrous connective tissue
B. supportive connective tissue
C. fluid connective tissue
D. areolar connective tissue

SOLUTION

Solution : C

There are two types of fluid connective tissues- blood and lymph. Blood circulates throughout the body supplying oxygen, nutrients and removes carbon dioxide and metabolic wastes from the body. Lymph on the other hand, carries materials from the blood stream into tissues and vice-versa. It also kills the pathogens, faciliated by the lymphocytes.

Question 8

The muscles which contract and relax upon our will are called __.

A.

striated muscles

B.

unstriated muscles

C.

cardiac muscles

D.

smooth muscles

SOLUTION

Solution : A

Muscles that are under the conscious control of an individual are skeletal or striated muscles. For example, the muscles in our arms move only when we want. Such muscles are also called voluntary muscles.

Question 9

Which among the following is not a characteristic of cardiac muscle?

A.

Branched

B.

Multinucleated

C.

Cylindrical

D.

Involuntary

SOLUTION

Solution : B

Cardiac muscle is a special tissue associated with the contractile wall of the heart. Cardiac muscle tissues are cylindrical, branched and uninucleated (having single nucleus). They are involuntary and have striations.

Question 10

The multicellular gland formed due to the inward folding of a portion of epithelial tissue is called ___. 

A. columnar epithelium 
B. cuboidal epithelium
C. glandular epithelium
D. squamous epithelium

SOLUTION

Solution : C

A portion of the epithelial tissue folds inward, and forms a multicellular gland. This is called glandular epithelium. This secrete substances at the epithelial surface.
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