It was found by Avery and his team that there is a transforming factor in living organisms which passes on the genetic information from one generation to other and this transforming factor is no other than the DNA. DNA has chromosomes which carries the genetic material responsible for expression of any trait.
Before findings of Avery, it was believed that genetic material was carried through proteins.
Answer: The vulnerable embryo must be sheltered from desiccation and other environmental hazards. In both seedless and seed plants, the female gametophyte provides protection and nutrients to the embryo as it develops into the new generation of sporophyte.
<span>The answer to this is Halcion which is medical treatment given to patients with sleeping disorders such as insomnia. It helps you fall asleep faster and for a longer period of time.</span>
