Match the gases in column A with their harmful effects in column B: (i) Carbon monoxide (ii) Oxides of nitrogen (iii) Carbon dioxide, matched with (a) causes acid rain (b) causes global warming (c) forms carboxy-haemoglobin.

Blood cell is a:

Azolla can be used to increase _______ content in the soil.

Which tissue is most diverse and largest in number in our body?

Read the following statements: (a) Protoplasm means all the substances inside the cell membrane (b) Cytoplasm is the part of protoplasm including nucleus (c) Cell organelles are the specific parts seen in the cytoplasm to perform physiological functions