(A) Excretory
(B) Digestive
(C) Sexual
(D) Nervous
The cell which converts light energy into electirical energy is called?
(A) Magnetic cell
(B) Electric cell
(C) Photoelectric cell
(D) All of the above
Which instrument measures the humidity in air?
(A) Manometer
(B) Hygrometer
(C) Barometer
(D) None of the above
From the following given organs which is excretory organ?
(A) Adrenal gland
(B) Liver
(C) Heart
(D) None of the above
Which from the following is not a excretory organ?
(A) Adrenal gland
(B) Liver
(C) Lungs
(D) Kidney
The art of silkworm breeding is called?
(A) Horticulture
(B) Sericulture
(C) Agriculture
(D) All of the above
Fish breathe through which of the following?
(A) Gills
(B) Lungs
(C) Fins
(D) Kidney
First discovered metal by man is?
(A) Copper
(B) Gold
(C) Bronze
(D) None of the above