Everyday Science MCQs

5120 MCQs (Page 418 of 512)

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Which of the following statements about fractures in old age is incorrect?

A. They are more common than in adult age.
B. Occur as a result of bone being thin and weak.
C. Due to good blood supply it results in quick healing.
D. It involves osteoblasts and osteocytes.

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If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?

A. Open reduction.
B. Closed fixation.
C. Open fixation.
D. Immobilization

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Stomata open due to _________ of K+ into the guard cells from the surrounding epidermis

A. Diffusion
B. Active transport
C. Osmosis
D. All of these

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Addition of salts and other solutes from other cells into xylem sap, __________ the water potential of the xylem sap

A. Increases.
B. Lowers.
C. Doesn’t effect.
D. Maintains.

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Single circuit heart is found in_________?

A. Fishes
B. Amphibians
C. Reptiles
D. Mammals

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There are _________ hypothesis which may explain opening and closing of stomata?

A. One
B. Two
C. Three
D. Four

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Low level of CO2 favours _________ of the stomata.

A. Opening
B. Closure
C. Both of these
D. None of these

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Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.

A. Bacteria
B. Viruses
C. Fungi
D. Cyanobacteria

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95% of the cytoplasm of red blood cells is the___________?

A. Antibodies
B. Hemoglobin
C. Enzymes
D. Proteins

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Open circulatory system can contain_________?

A. Red blood cells
B. White blood cells
C. Haemoglobin
D. All of these

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