Option “1” is correct Adamsia palliate (Sea anemone) and Common Sea Pen also known as Pennatula phosphorea are examples of Coelenterata.
882. Which one of the following is NOT a function of kidney?
1. Regulation of blood pH
2. Removal of metabolic wastes from the body
3. Production of antibodies
4. Regulation of osmotic pressures of the blood
Option “3” is correct Kidneys are essential in the urinary system and also serve homeostatic functions such as the regulation of electrolytes, maintenance of acid-base balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural filter of the blood, and remove wastes which are diverted to the urinary bladder whereas the antibodies are produced by antigens in the cell. Production or regulation is not a function of antibodies.
Webbed neck is a characteristic of Turner’s syndrome.
884. Which cell disorder in our body is responsible for color blindness?
1. WBC
2. Cone cell
3. Rod Cell
4. Neuron
Option “2” is correct The retina of the eye has two types of light sensitive cells called rods and cones, both are found in the retina. Rods work in low light conditions to help night vision, but cones work in daylight and are responsible for colour discrimination.
885. The part of brain which controls emotional reactions in our body is –
Option “1” is correct The brain’s limbic system controls emotional expression through the hypothalamus, which has control over the body’s emotional responses systems. The hypothalamus is responsible for regulating hunger, thirst, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior, etc.
886. An organism that transmits disease from one individual to another is called –
1. Hybrid
2. Fragment
3. Vector
4. Clone
Option “3” is correct An organism that transmits a disease agent from an infected to a non-infected animal or plant is known as vector.
887. Nephron is related to which of the following system of human body?
1. Circulatory system
2. Excretory system
3. Reproductive system
4. Respiratory system
Option “2” is correct A nephron is the basic structural and functional unit of the kidney which is part of excretory system. Its chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood, reabsorbing what is needed and excreting the rest as urine.
888. Which Vitamin is obtained from Sun rays?
1. Vitamin A
2. Vitamin C
3. Vitamin K
4. Vitamin D
Option “4” is correct Vitamin D is produced by the body in response to skin being exposed to sunlight. Vitamin D is essential for strong bones, because it helps the body use calcium from the diet.
889. Which non-flowering, spore bearing plants have roots?
1. Ferns
2. Angiosperms
3. Gymnosperms
4. None of these
Option “1” is correct
Ferns are non-flowering, deciduous or evergreen perennial plants that grow in various sizes having roots. The fern’s life cycle continues when spores germinate in sunlit, moist environments.
890. 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.
