Science Unit 1

Some engineers are creating models of several unicellular organisms. Which of these would all of the models have in common?

• They would all be made of many cells with cell walls.

• They would all have parts to help the, move around their environment.

• They would all have chloroplasts to trap sunlight and create their own food.

• They would all have one cell with smaller parts that do different jobs within the cell.

What part of this cell theory does this image illustrate?

• All organisms are made up of one or more cell.

• The cell is the basic unit of all living things.

• Cells divide to produce new cells.

• All of the above.

Which cell structure is responsible for collecting sunlight to perform photosynthesis in plants?

• large central vacuole

• cell wall

• cytoplasm

• chloroplast

Which of these statements explains a key difference between unicellular and multicellular organisms?

• Only multicellular organisms can photosynthesize.

• The cells of unicellular organisms are much smaller than the cells of multicellular organisms.

• Multicellular organisms have cell walls that provide structure and support for their cells, but unicellular organisms do not.

• All cells have organelles that carry out specific functions, but multicellular organisms also have cells that carry out specific functions.

Biologists study living things. What question can a biologist ask to determine if an object is a living thing?

• Does the object move?

• Does the object breathe?

• Is the object made up of cells?

• Is the object visible to the naked eye?

outside fence - where students enter and leave school

• nucleus

• cytoplasm

• mitichondria

• cell membrane

air in the school - fills the space throughout the entire building

• nucleus

• cytoplasm

• mitochondria

• cell membrane

cafeteria - where food is eaten and provides students with energy

• nucleus

• cytoplasm

• mitochondria

• cell membrane

principal's office - where the principal controls the activities and functions of the school

• nucleus

• cytoplasm

• mitochondria

• cell membrane

living

• unicellular

• multicellular

• both