Characteristics of Life | Biology

biology

study of life

characteristics of life

made of cells, homeostasis (interact with environment), metabolism (need for energy), reproduce, and grow/develop

modern cell theory

cells are smallest basic unit, all living things are made of cells, and cells come from preexisting cells

unicellular

made up of one cell

multicellular

made up of many cells

biological levels of organization

cells make up tissues, a group of tissues makes an organ, a group of organs makes an organ system

Homeostasis

Maintaining an internal environment.

feedback systems

self regulating systems that protect living things (example its hot outside so you sweat to cool down)

Metabolism

A chemical process that breaks down materials to produce Energy

autotroph

an organism that makes its own food

heterotrph

organism that cannot make its own food

cellular respiration

the process by which cells use oxygen and glucose to produce ATP

glucose

simple sugar that is an important source of energy

ATP

energy currency of the cell

zygote

fertilized egg

evolution

change in genes from between generations

Plants are _________ because they make their own ____________.

Autotrophs ; Food

Animals however are _________ because they gain energy through a process called ______________.

Heterogrophs; Cellular Respiration

5th Characteristic of Living Things is Reproduction. This can be _________

and ________________.

Unicellular; Multicellular

6th Characteristic of Living Things is Growth and Development which is based on instructions from the ____________.

DNA

7th Characteristic of Living Things is Response to Stimuli which can be a response to ______ stimuli and __________ stimuli.

External Stimuli ; Internal Stimuli

8th Characteristics of Living Things is Evolution which occurs over a period of time due to ___________ and _________.

Natural Selection and Adaptations