Q. If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be -
1) R/4
2) R/2
3) R
4) 2R
Q. Which of these waves can be polarised?
1) Sound waves in the air
2) Longitudinal wave on a string
3) Transverse waves on a string
4) Light waves
Q. The best example of Polyembryony is -
1) Cocoa
2) Capsicum
3) Citrus
4) Cycas
Q. Which of the following is a chromoprotein?
1) Mucin
2) Haemoglobin
3) Peptones
4) Vitelline
Q. Root Hairs arise from -
1) Cortex
2) Pericycle
3) Epidermis
4) Endodermis
Q. A parenchyma cell that stores ergastic substance is known as -
1) Phragmoblast
2) Idioblast
3) Conidioplast
4) Chloroplast
Q. Rhizobium is a kind of -
1) Photosynthetic bacteria
2) Symbiotic bacteria
3) Parasitic bacteria
4) Saprophytic bacteria
Q. The space retaining life in any form is called -
1) Biomass
2) Biosphere
3) Lithosphere
4) Hydrosphere
Q. The areas marked by internal drainage -
1) Plateau
2) Plains
3) Deserts
4) Mountains
Q. Llanos are the grasslands of -
1) Guyana Highlands
2) Brazillian Highlands
3) Argentina
4) Chile
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