33 Science -- Invertebrates

Differentiate between:a.    Pupa and cocoon.b.    Pupa of silkworm and pupa of honey bee.c.    Natural silk and artificial silk.

Differentiate between:
a.    Pupa and cocoon.
b.
    Pupa of silkworm and pupa of honey bee.
c.    Natural silk and artificial silk.

a.    Pupa and cocoon.

Pupa
Cocoon
It is the third stage of lifecycle.It is the spherical cover of pupa of silk moth.
It is found inside cocoon.It covers pupa.
It is living beings.It doesn't have life.
It remains passive inside cocoon.It protects the pupa from external dangers.
b.    Pupa of silk moth and pupa of honey bee.

Pupa of silk moth
Pupa of honey bee
It is found inside cocoon.It is found inside hexagonal wax cells.
This stage last for (12-14) days.This stage last for 9 days.

c.    Natural silk and artificial silk.

Natural silk
Artificial silk
It is very shiny, light and durable.It is not shiny as natural silk.
It is long-lasting and elastic.It is not long-lasting and elastic.
It absorbs water readily and dries fast.It absorbs water fast and dry slowly.


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