natsci topic 4 review

What two types of living things can we distinguish according to the type of cell?

multicellular and unicellular

Read the text and fill in the missing gaps using the following words: wall / larger / chloroplasts / different / organelles / plant

Plant cells and animal cells are different. Plant cells are usually larger and more regular. They also have a rigid outer membrane wall and chloroplasts, organelles filled with chlorophyll for photosynthesis.

Order the levels of organization of the human body from simplest to most complex.

1. molecules

2. cells

3. tissues

4. organs

5. systems and apparatuses

Cell membrane

Encloses the cell

Cytoplasm

Contains cellular organelles in a watery environment

nucleus

Is bounded by a membrane that separates it from the cytoplasm

DNA or genetic information

Located inside the nucleus

Cell membrane

Controls the entry and exit of substances, Maintains the shape of the cell

Cytoplasm

Stores water, salts and other substances

Chloroplast

Responsible for the process of photosynthesis

Lisosomes

Performs cellular digestion

Mitochondria

Performs the process of cellular respiration

Ribosomes

Produces proteins

What is the name of the layer that limits the cell?

Plasma membrane

What is the name of the liquid that fills the cell?

Cytosol

Which of the following organelles is unique to bacteria?

Mesosomes

Which of the following structures is unique to plant cells?

Cellulose wall

Which of the following characteristics is not characteristic of plant cells?

Small vacuoles

What is the size of most eukaryotic cells?

0.02mm

Prokaryotic cell

present in unicellular organisms, presence of cell membrane and cytoplasm, presence of genetic info

Eukaryotic cell

Present in unicellular and multicellular organisms, presence of cell membrane, cytoplasm, nucleus, organelles, and genetic info