The phenomenon of summer sleep by animals is called
A. Hibernation
B. Aestivation
C. Laziness
D. Lethargy
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Animals who have constant body temperature are
A. Homeothermic
B. Hemothermic
C. Hematology
D. Histology
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Which type of cell, skin is made up of:
A. Epidermal cells
B. Connective tissue
C. Permanent tissues
D. Parenchyma
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Cold blooded animals are known as
A. Homiotherms
B. Eurytherms
C. Endotherms
D. Poikilotherms
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Ginger is a stem and not a root because
A. It stores food
B. It lacks chlorophyll
C. It has nodes and internodes
D. None of the above
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Which of the following plants produce only seeds but no fruit?
A. Sugarcane
B. Peanut
C. Cycas
D. Almond
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Consider the following plant 1. Guava 2. Mint 3. Sweet potato The roots of which of these plants bear adventitious buds that developed into new individuals under favourable conditions.
A. 1 and 2
B. 2 only
C. 3 only
D. 1, 2 and 3
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Potato is a
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The "eyes" of potato tubers are
A. Shoot buds
B. Flower buds
C. Root buds
D. Axillary buds
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Which of the following is responsible for transport of food and other substances in plants?
A. Xylem
B. Phloem
C. Chloroplast
D. None of these
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Salts and sugars works to preserve foods by creating a
A. Hypertonic environment
B. Lower pH
C. Depletion of nutrients
D. Lower osmotic pressure
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Movement of cell against concentration gradient is called
A. Active transport
B. Diffusion
C. Osmosis
D. Passive transport
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Which one among the following Indian scientist proposed a theory for long distance transport of water in plants?
A. J.C. Bose
B. Birbal Sahni
C. P. Maheshwari
D. N.S. Parihar
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The movement of materials across the cell membrane with the help of biological energy provided by ATP is called
A. Active Transport
B. Passive Transport
C. Endocytosis
D. Fractionation
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Which process requires no energy from the cell?
A. Osmosis
B. Diffusion
C. Both A & B
D. None of the above
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Oxygen crosses a plasma membrane by
A. Osmosis
B. Evaporation
C. Concatenation
D. Diffusion
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Which of the following is true of osmosis?
A. It is a type of diffusion
B. Movement is against water's concentration gradient
C. Requires energy
D. All of the above
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The water readily available to plants for absorption by roots is
A. Gravitational water
B. Rain water
C. Hygroscopic water
D. Capillary water
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The process of evaporation occurs from
A. Root
B. Stem
C. Leaf
D. Entire 'plants' surface
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Which process requires cellular energy?
A. Passive transport
B. Active transport
C. Both A & B
D. None of the above
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