Mention the type of allele that expresses itself only in homozygous state in an organism.

Mention how is mutation theory of Hugo de Vries different from Darwin’s theory of natural selection.

Why are some organisms called as eurythermals and some others as stenohaline?

Malaria, typhoid, pneumonia and amoebiasis are some of the human infectious diseases. Which ones of these are transmitted through mechanical carriers?

Name any two techniques that serve the purpose of early diagnosis of some bacterial/viral human diseases.