Biology Chapter 1 (test 1)

Cell

Basic unit of LIFE

Atom

Basic unit of MATTER

Biology

The scientific study of life

1) living things are organized
2) acquire materials and energy
3) maintain homeostasis
4) respond to stimuli
5) produce and develop
6) have adaptations

What are the six characteristics of life

emergent properties

New properties that arise with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases. (Added variables)

Structure and function

The cell is the basic unit of __________ and ___________ of all living things

Levels of biological organization (simple ��> complex)

Atom, molecule, cell, tissue, organ, organ system, organism

Atom

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

Molecule

Union of two or more atoms of the same or different elements

Cell

The structural and functional unit of all living things

Tissue

A group of cells with a 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; complex individuals containing organ systems

Energy:

the ability to do work

What is something energy is needed for

Life-sustaining processes such as Chemical reactions

Metabolism

All the chemical reactions that occur in a cell

Sun

The ultimate source of energy for nearly all life on earth

Photosynthesis

A process that convert solar energy into the chemical energy of carbohydrates (using the sun to convert energy)

Created ; destroyed - transferred

Energy can never be ___________ not ___________ - only _________.

chemical cycling and Energy flow

Ecosystems are characterized by:

Homeostasis

-Maintenance of internal conditions within certain boundaries (balance)
-ability to maintain a state of biological balance

Living things respond to stimuli

Staying alive by reacting to pain, thirst, etc

Movement

The ability to respond often produces ___________.

diverse

A population it strongest when it's most ___________.

DNA

Code/blue print

characteristics

Genes determine _________ of an organism

DNA (deoxyribonucleic acid)

Genes are composed of _______.

Mutations

inheritable changes in genetic information (can be good or bad)

Adaptation

Any modification that makes an organism better able to function in a particular environment

Evolution

The change in a population of organisms over time to become more suited to the environment

giraffes long neck to reach trees, camel back holds water

Example of evolution

diversity and unity

The theory of evolution explains the ______ and _________ of life