4 bio theories

Question 1

Four theories that unify biology

Answer 1

1. cell theory
2. gene theory
3. theory of heredity
4. theory of evolution

Question 2

Cell Theory

Answer 2

one of the four theories that unify biology
- all organisms are composed of at least one cell
- all cells come from pre-existing cells
*cells are the smallest unit of life

Question 3

Gene Theory

Answer 3

one of the four theories that unify biology
*all living organisms are controlled by genes
- Gene = segment of DNA
- genes encode proteins, RNA, regulate genes
genes have code for specific characteristics

Question 4

Theory of Heredity

Answer 4

one of the four theories that unify biology
- genes are passes as discreet units from parents to offspring
- Mendel’s Theory of heredity gave rise to genetics
- the chromosomal theory of inheritance located genes on chromosomes

Question 5

Theory of Evolution

Answer 5

one of the four theories that unify biology
- Genetic change in a population over time
- Darwin’s theory of evolution explains
(a) unity and diversity of life
(b) “decent with modification” via natural selection
-changes in genes can result in adaption and evolution