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