841. Nutrients are recycled in the atmosphere with the help of certain microorganisms referred to as –
1. Producers
2. Consumers
3. Decomposers
4. None of these
Option “3” is correct
A decomposer is an organism that decomposes, or breaks down, organic material such as the remains of dead organisms. Decomposers include bacteria and fungi. Nutrients are recycled in the atmosphere with the help of them.
Option “3” is correct Amino acids are required for the synthesis of body protein and other important nitrogen-containing compounds. Amino acids are constituents of protein and act as precursors for many co-enzymes, hormones, nucleic acid, etc.
845. Transpiration increases in:
1. Hot, dry and windy condition
2. Hot, damp and windy condition
3. Cool, damp and windy condition
4. Cool, dry and still condition
Option “1” is correct Conditions which increase the rate of evaporation also increase the rate of transpiration. Transpiration is more rapid in hot, dry and windy conditions than it is in still or humid conditions.
846. What is the Kyoto Protocol?
1. It is an agreement among countries to take steps for reducing acid rain
2. It is an agreement among countries to take steps for planting trees to control pollution
3. It is an agreement among countries to start using nuclear energy
4. It is an agreement among countries to take steps for reducing green house gases emission.
Option “4” is correct The Kyoto Protocol is an international treaty, which extends the 1992 United Nations Framework Convention on Climate Change (UNFCCC) that commits State Parties to reduce greenhouse gases emissions.
847. Which of the following is an excretory organ of cockroach?
Option “1” is correct The excretory organ of cockroach is the malpighian tubules. It is found at the junction of the midgut and hind gut and are about 150 in number. They are fine, yellow coloured and branched threads present in bundles. They lie freely in the haemolymph.
Risedronate medicine is for use when you have a high risk of bone fracture due to osteoporosis.
849. Eustachian Tube is located in which part of human body?
1. Nose
2. Ear
3. Eyes
4. Throat
Option “2” is correct The Eustachian tube, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear.
850. Which part of the brain plays an important role in motor control?
1. Cerebellum
2. Cerebrum
3. Medulla
4. Pons
Option “1” is correct The cerebellum is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established. The cerebellum does not initiate movement, but it contributes to coordination, precision, and accurate timing.
