In protozoa like Amoeba and Paramecium, a organ is found for osmoregulation which is
The correct option is (A) : Contractile vacuole
The process of controlling the water balance within a protozoan's body is known as osmoregulation. By pushing water out of the cell, contractile vacuoles assist in achieving this. Freshwater protozoans have it, but parasitic and marine protozoans don't. The contractile vacuole is necessary for the control of water balance in amoeba and paramecium.
Column I | Column II | ||
A | Gutturi | I | Into the left ear |
B | In oculum sinistram | II | Into the right eye |
C | In aurem sinistram | III | For the left eye |
D | In oculum dextrum | IV | To the throat |
The current passing through the battery in the given circuit, is:
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
A full wave rectifier circuit with diodes (\(D_1\)) and (\(D_2\)) is shown in the figure. If input supply voltage \(V_{in} = 220 \sin(100 \pi t)\) volt, then at \(t = 15\) msec:
The nervous system must receive, accept, and processes information about the world outside in order to react, communicate, and keep the body safe and healthy. Much of this information comes by way of the sensory organs: the eyes, nose, ears, tongue, and skin. Specialized cells and tissues within these organs obtain raw stimuli and translate them into signals the nervous system can use. Nerves communicate the signals to the brain, which interprets them as sight (vision), sound (hearing), smell (olfaction), taste (gustation), and touch (tactile perception).