Subject :NSO Class : Class 7
Which of the following statements is/are correct?
I. The excretory system in humans consist of a pair of
kidneys, ureter, urinary bladder, a pair of urethras
and urinary opening.
II. In lower animals such as Hydra waste product is
excreted by the process of diffusion through the
body surface.
III. The urine passes from the kidneys through urethra
into urinary bladder.
IV. Urine consists of water, urea and other waste
products and urea is breakdown product of proteins.
AI and IV
BII and IV
CII and III
DI and III
i even do think that the 1st option is correct
Ans 1:
Class : Class 7
This is wrong. Hydra is a Cnidarian, therefore the waste exits through its mouth.
Ans 2:
Class : Class 7
9jh
Ans 3:
Class : Class 10
B