Biology Quiz
Q76. In N2- fixation process, nitrite is converted to nitrate by
(A) Nitrobacter
(B) Azotobacter
(C) Nitosomonas
(D) Azospirillum
Answer: (A) Nitrobacter
Q77. The most abundant element present in plant is
(A) nitrogen
(B) manganese
(C) carbon
(D) iron
Answer: (C) carbon
Q78. Stomata open at night in
(A) CAM plants
(B) C3 plants
(C) C4 plants
(D) succulent plants
Answer: (A) CAM plants
Q79. Rate of transpiration can be measured by
(A) Ganong's potometer
(B) auxanometer
(C) respirometer
(D) porometer
Answer: (A) Ganong's potometer
Q80. Root pressure is developed in
(A) cortex
(B) phloem
(C) xylem
(D) pith
Answer: (C) xylem
Q81. The fossil organisms which show characters of two different groups of animals are called
(A) transitional forms
(B) missing links
(C) transitory organisms
(D) past links
Answer: (B) missing links
Q82. Coralloid roots occur in
(A) Cycas
(B) Pinus
(C) Gnetum
(D) Ephedra
Answer: (A) Cycas
Q83. Gemma cups are found in
(A) Sphagnum
(B) Marchantia
(C) Riccia
(D) Anthoceros
Answer: (B) Marchantia
Q84. Green mould is common name for
(A) Neurospora
(B) Mucor
(C) Penicillium
(D) Saccharomyces
Answer: (C) Penicillium
Q85. Volvox colonies are found in
(A) freshwater ponds
(B) salt lakes
(C) seawater
(D) spring
Answer: (A) freshwater ponds
Q86. The layer of cells between endodermis and vascular bundles is called
(A) hypodermis
(B) cortex
(C) pith
(D) pericycle
Answer: (A) hypodermis
Q87. Growth rings are formed by the activity of
(A) xylem
(B) phloem
(C) cambium
(D) both phloem and xylem
Answer: (C) cambium
Q88. The "eyes" of potato tubers are
(A) shoot buds
(B) flower buds
(C) root buds
(D) axillary buds
Answer: (D) axillary buds
Q89. In pomegranate, the fruit is known as
(A) balausta
(B) pepo
(C) amphisarca
(D) hesperidium
Answer: (A) balausta
Q90. Which of the following does not develop from tap root system
(A) Napiform root
(B) Conical root
(C) Fusiform root
(D) Moniliform root
Answer: (D) Moniliform root