Cell Theory and Living Organisms

These flashcards cover key concepts of cell theory and characteristics of living organisms.

What are the main principles of Cell Theory?

All organisms consist of cells or the products of cells; all cells come from pre-existing cells through cell division; cells are the building blocks of life.

What is the smallest independent unit of life?

The cell.

What are the characteristics of living things?

Movement, respiration, sensitivity, growth, reproduction, excretion, and nutrients.

What is the size range of unicellular organisms?

1-10 mm.

What is the size of multicellular organisms?

10-100 μm.

Do unicellular organisms have a nucleus?

No.

Do multicellular organisms have a nucleus?

Yes.

What is the composition of chromosomes in multicellular organisms?

Humans have 23 pairs, totaling 46 chromosomes.

Which types of organisms are prokaryotic?

Bacteria and Archaea.

Which types of organisms are eukaryotic?

Plants, animals, fungi, and protists.