the cellular structure that transports materials within the cell
100
What is nuclear membrane?
the cellular structure that encloses and protects the nucleus
100
What is a ribosome?
an organelle that contains enzymes that help produce proteins
100
According to page 49, question 1, what does the diagram represent?
Metamorphosis
200
what is a cell membrane?
the structure around all cells that regulates movement of substances into and out of cells
200
What is homoestasis?
the ability to maintain a constant internal environment
200
What is a nucleus
the control center that contains chromosomes
200
What is a tissue?
a collection of cells that do a job
200
The human body has levels of organization that scientists order from least to most complex. Which of the answer choices on page 49, question 2 is most complex?
organ system
300
What is a cell wall
the outer structure around plant cells
300
What is a hormone?
a substance produced by an organism that stimulates a response within its cells
300
What is an organ?
a group of tissues that work together to do a job in the body
300
What is a vacuole?
a cavity inside a cell's cytoplasm that contains pigment and often stores food and water
300
Julan was looking at plant and animal cells under the microscope. What cell components could he only see in a plant cell?
cell wall
400
What is chloroplast?
a body inside a plant cell which converts sunlight into food energy
400
What is metamorphosis?
a change of forms that some animals must go trough to reach maturity
400
What is an organ system?
a group of organs that work together to form a set of functions
400
True or False: Tissue can only be in an animal, not a plant?
False, tissue in in both an animal and a plant
400
Which of the answer choices on page 49, question 4 is an example of homeostasis?
A
500
What is cytoplasm?
a clear, thick fluid that holds all the components of a cell
500
What is mitochondrin?
an organelle that releases energy tot he rest of the cell
500
What is an organelle?
a specialized structure within a cell
500
What is an example of an organelle?
mitochondrin or ribosome
500
What is the purpose of the endocrine system in the human body?