CH 2 study guide science 7th grade

Protist

Example - amiba, and Eugenia The third most complex 3

Eubacteria

Example- bacteria most complex kingdom 1

Archaebacteria

Example- bacteria second most complex 2

Fungi

Example- mushrooms It is the fourth most complex 4

Animals

Examples- Humans, dogs, birds, fish 6

Plants

Examples- cactus, flowers trees it is the second to simplest 5

examples of proteins

spider webs, horns, hair, and feathers.

Homeostasis-

The maintenance of a constant internal state in a changing environment. Balance.

Cell-

The smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm.

Metabolism-

The sum of all chemical processes that occur in an organism.

ATP

energy carrying molecules.

Carbohydrates-

A class energy-giving nutrients that include sugars, starches, and fiber, contains carbon hydrogen, and oxygen. they are energy rich molecules.

proteins-

A molecule that is made up of amino acids and that is needed to build repair body structures and to regulate processes in the body. Included in life processes.

Lipids-

A type of biochemical that does not dissolve in water; fats and steroids are lipids. Do not mix with water.

ATP-

Adenosine triphosphate, a molecule that acts as the main energy, source for cell processes.

Making Proteins

Amino Acids link together to form new proteins. Proteins are either made up with a few acids or more then 10,000 organisms break down acids.

producer-

An organism that can make its own food by using energy from its surrounding.

consumer-

An organism that eats other organisms or organic matter.

decomposers-

An organism that gets its energy by breaking down the remains of dead organisms or animal waste and consuming or absorbing nutrients.

Nucleic Acids

DNA

Proteins

Involved in almost all life processes, are large molecules made up of smaller molecules called amino acids.

Lipids

Lipids store energy and form cell membranes.

the 6 characteristics of life

Living things have cells living things sense and respond to things living things reproduce living things have DNA living things use energy living things grow and develop

Carbonhydrates

Molecules made up of sugar used as a source of energy or energy storage for cells. examples are sugar fond in fruit and starches found in vegetables.

enzymes-

Other proteins that start or speed up chemical reactions in cells.

Necessities of life

Water Stable internal condition Food A place to live

nucleic acids-

a molecule made up of subunits called nucleotides. (DNA)