10th Grade > Biology
CONTROL AND COORDINATION MCQs
Total Questions : 57
| Page 2 of 6 pages
Answer: Option B. -> Reduced production of growth hormone
:
B
One of the main hormones produced by pituitary is the growth hormone. This hormone is responsible for growth of the body. Excessive secretion of growth hormone causes gigantism and lack of growth hormone in a developing child causes dwarfism.
:
B
One of the main hormones produced by pituitary is the growth hormone. This hormone is responsible for growth of the body. Excessive secretion of growth hormone causes gigantism and lack of growth hormone in a developing child causes dwarfism.
Answer: Option B. -> Phototropism
:
B
Phototrophic movement is the growthof a plant in response tolight.
If the plant part growstowards light, it is called positive phototropism, and if the plant part growsaway from light, it is called negative phototropism. The shoot of a plant shows positive phototropism and the root of a plant shows negative phototropism.
:
B
Phototrophic movement is the growthof a plant in response tolight.
If the plant part growstowards light, it is called positive phototropism, and if the plant part growsaway from light, it is called negative phototropism. The shoot of a plant shows positive phototropism and the root of a plant shows negative phototropism.
Answer: Option A. -> Gibberellin – internodal elongation
:
A
Gibberellins promote internodal growth. Auxin helps in apical dominance. Cytokinin brings about cell division and ethylene promotes ripening of fruits.
:
A
Gibberellins promote internodal growth. Auxin helps in apical dominance. Cytokinin brings about cell division and ethylene promotes ripening of fruits.
Answer: Option B. -> A - 3, B - 4 , C - 1, D - 2
:
B
Adrenaline hormone is a crucial part of the body's fight-or-flight response.Adrenaline is produced bytheadrenal glands.
When the level of growth hormone is low, the hypothalamus releases growth hormone releasing factor which stimulates the pituitary gland to release growth hormone.
Iodine is necessary for the thyroid gland to make thyroxin hormone.
:
B
Adrenaline hormone is a crucial part of the body's fight-or-flight response.Adrenaline is produced bytheadrenal glands.
When the level of growth hormone is low, the hypothalamus releases growth hormone releasing factor which stimulates the pituitary gland to release growth hormone.
Iodine is necessary for the thyroid gland to make thyroxin hormone.
Answer: Option A. -> Cytokinin
:
A
Cytokininspromote cell division, cell growth and differentiation along with auxin. Ethylene is responsible for fruit ripening. Abscisic acid helps the plant to sustain in adverse conditions. Gibberellins enable the plants to grow taller.
:
A
Cytokininspromote cell division, cell growth and differentiation along with auxin. Ethylene is responsible for fruit ripening. Abscisic acid helps the plant to sustain in adverse conditions. Gibberellins enable the plants to grow taller.
Answer: Option B. -> cranium
:
B
The bony structure in our head is called the skull. Cranium is the part of the skull that encloses the brain. Three layers of meninges are present below the cranium. Eight bones enclose the brain and form the cranium and fourteen bones form the face. These bones together make up the skull.
:
B
The bony structure in our head is called the skull. Cranium is the part of the skull that encloses the brain. Three layers of meninges are present below the cranium. Eight bones enclose the brain and form the cranium and fourteen bones form the face. These bones together make up the skull.
:
A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. In humans there are 31 pairs of spinal nerves, one on each side of the vertebral column.
Answer: Option A. -> Thyroxine
:
A
Thyroxine, a hormone that contains iodine, is secreted by the thyroid gland. It increases the rate of cell metabolism and regulates growth. Thyroxine can also be made synthetically for the treatment of hypothyroidism.
:
A
Thyroxine, a hormone that contains iodine, is secreted by the thyroid gland. It increases the rate of cell metabolism and regulates growth. Thyroxine can also be made synthetically for the treatment of hypothyroidism.
Answer: Option B. -> adrenal glands
:
B
The adrenal glands are two glands that sit on top of our kidneys.They secrete the hormone known as adrenaline. Adrenaline creates a 'fight or flight' response. 'Fight or flight' is a type of response that helps us prepare to face or runaway froma dangerous situation.
:
B
The adrenal glands are two glands that sit on top of our kidneys.They secrete the hormone known as adrenaline. Adrenaline creates a 'fight or flight' response. 'Fight or flight' is a type of response that helps us prepare to face or runaway froma dangerous situation.
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