Which best describes the purpose of the blood system?
a. to transport oxygen, nutrients, and waste
b. to supply protection to organs
c. to cause movement
d. to send signals to the brain and muscles
A - to transport oxygen, nutrients, and waste
What part of a cell is jelly-like and holds the organelles?
Cytoplasm
What is the job of the cell membrane?
to be a barrier, and control what enters and exits the cell
Which best explains why humans are multicellular organisms?
A. Human cells are too small to function alone.
B. Human cells join together to form one large cell.
C. Humans need many cells to carry out life processes.
D. Humans have many systems that perform the same function.
C. Humans need many cells to carry out life processes.
How do the muscle and nervous system work together?
The nerves send signals to the brain to tell your body to move, and then the brain sends signals to the muscles to cause movement
Which body system creates the structure of a body?
a. respiratory
b. blood
c. nervous
d. bone
bone system
Molly is reading a book in science class. She reads one sentence that says, “This organism is capable of surviving as a single cell.” Which organism is she most likely reading about?
A. a mushroom
B. a bacteria
C. an insect
D. a flower
B. a bacteria
What part stores water, food and waste?
Vacuole
Which best describes a single-celled organism?
A. a small group of organisms
B. a small organism with a variety of parts
C. an organism that relies on other organisms to survive
D. an organism that is able to carry out all its life processes
D. an organism that is able to carry out all its life processes
What can you tell about plants from the microscope images above? Provide evidence to support your statement.
The plant is made of cells, because of the repeating pattern
Which best describes the nervous system?
a. a system made up of the brain and nerves that delivers nutrients and removes waste from the body.
b. a system made up of lymph and blood that delivers nutrients and removes waste from the body.
c. a system made up of the brain and nerves that delivers messages throughout the body.
d. a system made up of the heart and blood that delivers messages throughout the body.
c. a system made up of the brain and nerves that delivers messages throughout the body.
What is the name of a group of cells with the same function?
tissue
What part of the cell is the control center or brain?
Nucleus
What is a characteristic of all living things?
They are all made of cells
What is happening to these cells?
They are duplicating and splitting
Which system moves the body?
a. nervous system
b. muscular system
c. circulatory system
What is the muscular system?
How are single-celled organisms and multi-celled organisms similar?
A. Both need food for energy and growth.
B. Both have a skeletal system for support.
C. Both require the interaction of many cells to survive.
D. Both are able to carry out all life functions in only one cell.
A. Both need food for energy and growth.
What is the name of the part that provides energy to the cell?
Mitochondria
Describe the differences between plant and animal cell shapes
What does a bone cell need to be able to duplicate? Where does a bone cell get what they need?
Nutrients. Bone cells get nutrients from the plasma in the blood, which travels through the blood vessels all over the body
Which are the components of the blood system?
plasma, platelets, red blood cells, white blood cells
What part of a cell duplicates first during the process of cell reproduction?
chromosomes or DNA
What is the part of the plant cell that helps produce food through photosynthesis?
Chloroplast
How do nutrients get into cells?
Plasma with nutrients goes through tiny gaps in the cell membrane or cell wall (in plant cells)
How long does growth take in the body?
It takes many years for the gaps in the growth plates to close, which is growth