One week old embryo can be preserved at

Food material can be preserved at

Which can preserve food stuff

Why Pollen grain can be preserved as fossils?

Viable material of endangered species can be preserved by :

Gametes of threatened species can be preserved in a viable and fertile condition for a long time' Identify the preservation technique used?

Viable material of endangered species can be preserved by

Original remains of organism can be preserved in________

Pollen grains can be preserved as fossil because