Section 2 Living Things A.How are living things or organisms alike? 1.Living things are organized....
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Section 2 Living Things A. How are living things or organisms alike? 1. Living things are organized. a. Cell – the smallest unit of an organism that carries on the functions of life. b. Each cell has an orderly structure and contains hereditary material. Example: Muscle cells need to be worked hard to win at a sport.
Transcript of Section 2 Living Things A.How are living things or organisms alike? 1.Living things are organized....
Section 2 Living Things
A. How are living things or organisms alike?1. Living things are organized.
a. Cell – the smallest unit of an organism that carries on the functions of life.
b. Each cell has an orderly structure and contains hereditary material.
Example: Muscle cells need to be worked hard to win at a sport.
Living Things respond
Stimulus – anything that causes some change in an organism.
– Example: Sun giving energy to a plant.
Response – the way an organism reacts to a stimulus, often results in movement– Example: A plant leaning towards the Sun
Homeostasis – maintaining the proper conditions inside an organism.
- Example: A normal body temperature of 98.6 degrees
Living things use energy
Example: Food gives humans energy
Living things grow and develop– Growth of many – celled organisms is due to an
increase in the number of cells.• Example: Growing 4 inches over the summer
– Growth of one – celled organisms is due to an increase in size of the cell.
– Development – changes that take place during the life of an organism
• Example: A puppy is less clumsy after one year
– Living things reproduce• Example: A cat having kittens
What do living things need?
• A place to live that provides for all of the organism’s needs.
• Raw materials like water, proteins, fats, and sugars
