1.

(a) Why cross fertilization occurs in earthworm though it is bisexual ? (b) What is the main food of earthworm ? (c) Name the small pills, consisting of undigested matter and soil, that are passed out by earthworm.

Answer» (a) Earthworms reveal cross fertilization. The reason for this is that it shows protandry , i.e., spermatozoa get matured before the ova.
(b) The main food of earthworm is decaying organic matter of the soil.
(c) Worm castings


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