Science Class 6th

101. Plants prepare their food in the leaves by a process called _____ .

A. Respiration

B. Photosynthesis

C. Excretion

D. Food factory

102. When thin transverse layer of leaf is observed, how many layers could be seen?

A. 2

B. 3

C. 4

D. 5

103. Outermost layer that covers the upper and lower surface of leaf is called?

A. Dermis

B. Epidermis

C. Mesophyll

D. None of these

104. The cells of epidermis are “ _____ ” packed.

A. Loosely

B. Closely

C. Both (a) and (b)

D. None of these

105. Upper surface of the leaf is called?

A. Upper epidermis

B. Dermis

C. Upper surface

D. All of these

106. Stomata are present in _____ epidermis.

A. Upper

B. Middle

C. Lower

D. All of these

107. Stomata helps in?

A. Intake of Carbon

B. Exchange of gases

C. Exchange of Oxygen

D. All of these

108. The tissues lying between upper and lower epidermis is called?

A. Mesophyll

B. Epidermis

C. Conducting

D. All of the above

109. Chlorophyll is present in?

A. Epidermis

B. Mesophyll

C. Cells

D. None of these

110.______ tissues lie in the center of mesophyll tissues.

A. Epidermis

B. Dermis

C. Conducting

D. None of these

111. Conducting tissues are?

A. Xylem

B. Phloem

C. Both (a) and (b)

D. None of these

112. Xylem transports?

A. Water

B. Salts

C. Both (a) and (b)

D. None of these

113. Phloem transports food from ?

A. Roots

B. Leaves

C. Stem

D. None of these

114. Plants convert sun light into _____ energy.

A. Kinetic

B. Mechanical

C. Chemical

D. All of these

115. “Photo” means?

A. Bulb

B. Light

C. Green

D. Preparation

116. “Synthesis” means?

A. Preparation

B. Light

C. Food

D. Water

117. Water combines with _____ in the presence of sunlight to prepare food.

A. Carbon

B. Carbin mono oxide

C. Oxygen

D. Carbon Dioxide

118. CO2 and H2O are the _____ materials for Photosynthesis.

A. Products

B. Raw

C. None of these

119. Products of Photosynthesis are?

A. Carbohydrates

B. Oxygen

C. Both ‘a’ and ‘b’

D. None of these

120. Oxygen is produced as ____ product in photosynthesis.

A. Primary

B. Main

C. Secondary

D. None of these