What is Biology Chapter 1 Biology is everywhere

What is Biology Chapter 1

Biology is everywhere Golden Age There is more going on with biology than ever before Cell growth and cancer Global climate Human activity disrupting ecological networks Diversity of life and the first microbes Gene mutation and disease DNA technology and forensics Stem cells being able to cure everything

Biology is the “study of living things” What is a living thing? http: //biology 1010. weebly. com/introduction. html Order: organized structure Regulation: adjusting internal environment Life has many levels Biosphere: where life exists Ecosystem: living organisms in an area Communities: interactions with an ecosystem (food web) Population: group of one specie Growth: positive change overtime Organisms: the individual Energy: take in and use energy Organ System: two or more organs working together Response to environment: sensory response Organs: carrying out important functions Tissue: a group of specialized cells that make up an organ Reproduction: reproduce their own kind Cells: smallest living thing Evolution: an organisms ability to change with environment Organelles: functional components of a cell Molecules: groups of atoms that make up organelles Atoms: from the periodic table Subatomic particles: responsible for bonding atoms together

Ecosystems All the living and non-living things that interact in a particular place in the environment. There are two major dynamics of any ecosystem: Recycling of chemical nutrients Water Nitrogen Phosphorous Carbon Flow of Energy transfer Energy enters as light and exits as heat Humans are disruptive in all ecosystems Changing the atmosphere

Cells and DNA Cells are the lowest level of structure that can perform all activities required for life. A gene is a small section of DNA that is responsible for inheritance There are 3 billion nucleotides in one human cell DNA has 4 nucleotides Adenine Guanine Cytosine Thymine

Diversity of Life 1. 8 million species 3 Domains of Life Bacteria Archaea Eukarya – has 4 kindoms Plantae Fungi Animalia Protists The universal genetic language of all living things is DNA

Evolution Darwin HMS Beagle Origin of Species Fossils Constantly changing Earth Common ancestors Natural Selection Turtles of Galapagos Island Predation of species that stand out – survival of the fittest Artificial Selection Wild mustard Domesticated dogs

The Process of Science Discovery Science – Investigation Hypothesis written about main point - quantitative Hypothesis Driven Science – Controlled Experiment Observations-Background Research/Knowledge Question Hypothesis/Prediction Experiment Independent Variable - testing Dependent Variable - changing Control - normal Constant - fair