Bio Lecture: Life and Science

Biology

Study of living organisms

Micro Biology

The study of Micro organisms like bacteria, fungi, and viruses

Characteristics shared by living organsims

Organized from the atom to the bioshphere, homeostatis, respond to internal and external stimuli, reproduce and grow, have an evolutionary history

Cell

The structural and functional unit of all living things

Molecule

Union of two or more atoms

Atom

Smallest unit of an element composed of electrons, protons, and nuetrons

Tissue

A group of cells with common structure and function

Organ

Composed of tissues functioning together for a specific task

Organ system

composed of several organs working together

Organism

An individual

Population

Organisms of the same species in a particular area

Community

Interacting populations in a particular area

How do we classify life?

Taxonomy

Three domains of life

Bacteria, Archaea, Eukarya

Distinguishing features of humans

Cultural heritage, highly developed brains, completely upright stance, creative language skills, varied tool use, modification of environment for own purposes

Science

A way about knowing about the natural world

Scientific theories in biology

Cell, Homeostasis, genes, ecosystem, evolution

Homeostasis

The internal environment of an organ stays relatively consistent

Steps of scientific method

Observation, develop, hypothesis, make a prediction, perform experiments, collect and analyze data, develop conclusion

Experimental variable

The variable that is changed or manipulated

Test group

A group of subjects athta are exposed to the experimental variable

Control group

A group for comparison that is not exposed to the experimental variable

Bioehtics

The branch of ethics concerned with he development and consequences of biological technology

Examples of bioethics

Genetic engineering, threats to biodiversity, cloning, stem cell research, many other topics

Human influence on ecosystem

Humans modify for their own purposes, Changes in human behavour and use of new tech can lead to new diseases, Human activities may contribute to an altered bioshpere