MCQ
In $1900$ $A.D.$ three biologists independently discovered Mendel's principles. They are
- ✓De Vries, Correns and Tschermak
- BSutton, Morgan and Bridges
- CAvery, McLeod and McCarthy
- DBateson, Punnet and Bridges
In $1900$, three botanists, Correns of Germany, De Vries of the Netherlands and Tschermak of Austria rediscovered his work after reaching similar conclusions independently.
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$(i)$ Cockroaches are brown or black bodied animals that are included in class insecta of phylum arthropoda.
$(ii)$ Males bear a pair of short, thread like anal styles which are absent in females.
$(iii)$ Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen.
$(iv)$ The nymph grows by moulting about $13$ times to reach the adult form.