chapter 1.1 what is life?

What is metabolism?

a combination of chemicals reacting through an organism and builds up or breaks down materials

what is an unicellular organism?

a single cell organism

What is a multicellular organism?

an organism composed of many cells

reproduction that involves one parent and produces offspring that is identical to the parent

asexual

What is the cell's main energy source?

carbohydrates

the process of change the occurs during an organisms life that produces a more complex organism

development

what is the most abundant chemical in a cell?

water

action or change in behavior

response

reproduction that involves tow parents and combines their genetic material to produce a new organism

sexual

changes in an organisms surroundings that causes the organism to react

stimulus

what is a cell?

the basic unit of structure and function in an organism

What is spontaneous generation?

the idea that living things can arise from nonliving things

What is homeostasis?

the maintenance of stable internal conditions

what is the building material of cells

proteins and lipids

what are the 6 characteristics all organisms share?

1. cellular organization 2. contain similar chemicals 3. use energy 4. respond to their surroundings 5. grow and develop 6. reproduce

what do all living thins need to survive?

1. food 2. water 3. living space 4. stable internal conditions

What is an autotroph?

An organism that can make its own food.

What is a heterotroph?

An organism that cannot make its own food.

Why is food so important?

it is an energy source

what is the genetic material of cells

nucleic acids

Why is water so important to life?

organisms need water to obtain chemicals from their surroundings, break down food, grow, move substances within their bodies and reproduce