Which of the following does not have blood but undergoes respiration?
Answer: Option C
Solution(By Examveda Team)Cockroach has blood known as homocoel, snails and kangaroos also have blood in their bodies. But hydra does not contain any blood but still it respires. It does not have any respiratory organs but it respires and thus exchanges gases throughout its body.
Ordinary table salt is sodium chloride. What is baking soda?
A. Potassium chloride
B. Potassium carbonate
C. Potassium hydroxide
D. Sodium bicarbonate
A. hole in ozone layer
B. decrease in the ozone layer in troposphere
C. decrease in thickness of ozone layer in stratosphere
D. increase in the thickness of ozone layer in troposphere
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
Pollination is best defined as
A. transfer of pollen from anther to stigma
B. germination of pollen grains
C. growth of pollen tube in ovule
D. visiting flowers by insects
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