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Life Science #1

Characteristics of Life

QuestionAnswer
Cells The building blocks of Life. Cells provide structure and function in all living organisms including plants and animals.
Microscopic Too small to be seen with the human eye. Cells are microscopic.
Unicellular Organisms with one cell
Multicellular Organisms that have cells tha come in a variety of sizes and shapes.
Hierarchy of Organization Cell Hierarchy comes in this order: Cells, Tissues, Organs, Organ Systems
Energy Living organisms produce and use energy
Photosynthesis Plants capture energy from the sun to make food or glucose
Stimulus Anything that makes us react: food, sound, smell, sight, heat, cold
Reaction How we react to to a stimulus: moving towards, away from, salivating
Growth Growth occurs when cells divide
Development The changes and organism goes through: Ex: child, teen, adult
Reproduce The production of offspring
Asexual Reproduction Only uses one cell, does not need an egg or sperm. Offspring look like parent.
Sexual Reproduction Two cells used to reproduce. Requires and egg and sperm, Helps species survive and gives variety to offspring
Adaptation Structures, chemicals and behaviors that help survival
Evolution The gradual change in species over time
Species A group of organisms that interbreed (mate) and produce fertile offspring
Heredity Passing traits from parents to offspring
Genetics The science of the study of heredity
DNA The information molecule in cells that carry the heredity information
Producers Make food like glucose. Ex: Algae, cyanobacteria, plants
Consumers Must use food from producers because they can't make food. Ex: Animals and protozoa
Created by: bigelowbulldog
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