Trilobites were evolved during
Salvian
Cambrian
Pre-cambrian
Devonian
(b)The orgin of trilobites is considered about $505-510$ millions of years ago during cambrian period. They become extinct in permian period.
Study of origin and development of humans in all their physical, social and cultural relationship is called
The theory of random genetic drift was proposed by
Match the following by using codes:
$A.$ Vernalization – $1. $ Camerarius
$B.$ Double fertilization – $2.$ Hofmeister
$C.$ Pollination – $3. $ Lysenko
$D.$ Alternation of Generations – $4. $ Nawaschin
During evolution of man many changes have taken place in his ancestral characters. Which one of the following is an unsignificant change
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