Aseel Samaro

Characteristics of living things

What is this building made of ?

What are we made of ?

Cells: The Building Blocks of Life!

What makes the dog alive ?

1. Living things have Cells

2. Living things Sense and respond to change

3. Living things reproduce

4. Living things have DNA

5. Living things use energy

6. Living things grow and develop

Characteristics of living things

Every living things composed of - one or - more cells. Thus, cells are the basic unit of living things.

A cell is a membrane-covered structure that contains all the materials necessary for life. Cells contain Nutrients DNA information many other things to help our body function in everyday activities.

Living things have Cells

Trillions of cells make up these organisms

Each of these organisms is made of only one cell

Living things have Cells

Cells perform specialized functions

For example:

1. Nerve cells transport signals

2. Muscle cells help in movement

Living things have Cells

All organisms have the ability to sense change in their environment and to respond to that change.

Please, expose some light on your friend’s eye

Stimulus (plural, stimuli) is a change that affects the activity of the organism

Stimuli can be: Light

Sound

Hunger

Living Things Sense and Respond to Change

A gentle touch causes a response in the plant

Living Things Sense and Respond to Change

Give more examples of stimuli

Living Things Sense and Respond to Change

Living Things Reproduce

The cells of all living things contain the molecule deoxyribonucleic acid (DNA)

DNA controls the structure and function of cells.

Thus, DNA is a special molecule that is found in the cells of all living things. It provides instruction for making molecules called protein

Protein take part in almost all of the activities of an organism’s cell

Living Things Have DNA

Organisms use energy to carry out the activities of life.

Name four activities in living things that require energy.

Living Things Use Energy

All living things, whether they are made of one cell or many cells, grow during periods of their lives.

In a single-celled organism the cell gets larger and divides, making other organisms.

In organisms made of many cells the number of cells gets larger, and the organism gets bigger.

In addition to getting larger, living things may develop and change as they grow.

Living Things Grow and Develop

Over time, acorns develop into oak seedlings, which become oak trees.

Living Things Grow and Develop

What are four living and four nonliving things that you interact with or see

everyday?

Living Things Grow and Develop