[1]Introduction To Biology Flashcards
What is Biology?
Biology is a science which is focused on studying of living organisms.
What are the 3 branches of Biology?
- Zoology
- Botany
- MicroBiology
What are the 7 Areas of Biology?
- Cell Biology [study of cells]
- Histology [studying tissues]
- Anatomy [studying about gross structure]
- Physiology [studying function]
- Biochemistry [studying biological molecules]
- Genetics [studying of inheritance]
- Ecology [studying environment]
What is the belief on the first formed organisms?
Heterotrophic
Anaerobic
Prokaryotes
How long ago were the first organisms formed?
3.5 bya
What type of relationship is present between the living and inanimate world?
Dynamic Relationship
Define ‘Natural Resources’
Natural Resources are the sources of materials and energy found naturally which are used in everyday life for economic development.
What are the results due to Over Exploitation of ‘Natural Resources’ ?
1.Environmental Pollution
2.Loss of Biodiversity
3.Desertification
Why is there a Over use of ‘Natural Resources’ ?
Due to increase in the human population
What is ‘Sustainable Food Production’?
Sustainable Food Production is the Production of sufficent amount of food for the human population using environmentally safe methods.
What are the methods that can be used for sustainable food production?
- Production of high yeilding plant and animal varieties
- Production of disease resistant plant and animal varieties
- Improving Post Harvest technological methods
Explain the terms ‘communicable diseases’ and ‘non communicable diseases’
Communicable Diseases -Infectious/Transmissible diseases
Non Communicable Diseases -Non Infectious /Transmissible diseases
What are the Factors organisms are diverse based on?
- Size
- Shape
- Form
- Habitat
Name the 7 main characteristics of organisms.
- Order & Organization
- Growth & Development
- Irritability & Coordination
- Heredity & Evolution
- Adaptation
- Metabolism
- Reproduction
Define ‘Metabolism’
Metabolism is the sum of all biochemical activities taking place in an organism.
Define ‘Growth’ & ‘Development’
Growth is the Irreversible Increase of dry mass
Development is the Irreversible Changes that takes place in the lifespan of an organism
Define ‘Irritability’.
Irritability is the ability to respond to stimuli from both internal and external environment.
How does Movement Occur?
Due to Irritability & Coordination
Explain ‘Adaptation’
Adaptation is the peculiarity of sturcture/physiology or behaviour that promotes the likelihood of an organism’s survival in a particular environment.
Explain ‘Reproduction’
Reproduction is the Ability to produce offspring for continous existence of species
What is Evolution?
Evolution is the ability of organisms to change over time as a result of genetic modification
What are the Non-Living entities showing Evolution?
1.Crystals Grow
2.Waves Move
What is the difference between Non-Living entities and Living showing Evolution?
Only Living display all these characteristics simultaneously.
What is the structural and functional unit of life?
Cell
Construct the hierarchieal level of organisms.
Molecules - Organelles - Cells - Tissues - Organs - Organ Systems - Organisms - Population - Community - Ecosystems - Biosphere
