Chapter 1 - Introduction To Biology Flashcards
(13 cards)
What is Biology?
Bios-
logia-
Bios - Life
Logia - Study of
How long ago was life on earth formed?
3.5 Billion years ago
Features of the first formed organisms :
Heterotrophic
Anaerobic
Prokaryotes
Organisms are diverse based on :
Size
Shape
Form
Habitat
7 Characteristics of living Organisms are:
1) Order and Organization
2) Metabolism
3) Growth and Development
4) Irritability and Coordination
5) Adaptation
6) Reproduction
7) Heredity and Evolution
What is Order and a organization
From molecular level to Biosphere level there is an order and organization in organisms to perform their biological functions efficiently
What is Metabolism ?
The sum of all the chemical activities taking place inside an organism is it’s metabolism
What is growth and development?
During growth an irreversible increase in dry mass occurs. Irreversible changes that occur during the life span of an organism is it’s development.
What is irritability and Coordination?
+ Irritability is the ability to respond to stimulus from both internal and external environment
+ Coordination is collective functioning of all relevant systems and organs of the body to produce a specific response to a stimulus
What is Adaptation?
Adaptation is a peculiarity of Structure, Physiology or Behavior that Promotes the likelihood of an organisms survival and reproduction in a particular environment
What is Reproduction?
The ability to produce a new offspring for the continuous existence of species
What is heredity and Evolution?
Ability of organisms to change over time as a result of genetic modification
Hierarchical levels of organization
Molecules, organells, cells, tissue, organ, organ system, organism, population, community, ecosystem, biosphere
