Father of different branches.

1.

Biology- Aristotle

2.

Botany- Theophrastus 

3.

Paleontology- Leonardo di Vinci 

4.

Eugenics- Francis Galton  

5.

Modern Botany - Linnaeus

6.

Immunology- Edward Jenner's

7.

Genetics- Gregor Mendel

8.

Modern Genetics- Thomas Hunt Morgan

9.

Cytology- Robert Hooke

10.

Botanical Illustrations- Krateuas

11.

Plant Anatomy- Nehemiah Grew

12.

Zoology- Aristotle

13.

Taxonomy- Carl Linnaeus

14.

Medicine- Hippocrates

15.

Histology- Marie François Xavier Bichat

16.

Mutation Theory- Hugo de Vries

17.

Comparative Anatomy- Georges Cuvier

18.

Mycology- Pier Antonio Micheli

19.

Plant Physiology- Stephen Hales

20.

Bacteriology- Louis Pasteur

21.

Microbiology- Antonie Van Leeuwenhoek

22.

Indian Mycology- Edwin John Butler

23.

Indian Bryology- Shiv Ram Kashyap

24.

Indian Ecology- Ramdeo misra

25.

Indian Phycology- Parthasarthy Iyengar 

26.

Modern Embryology- Karl Ernst von Baer