Molecules and Experiments
What is a molecule?
Two or more atoms chemically bonded together
What is the difference between unicellular and multicellular organisms?
Unicellular organisms have one cell; multicellular organisms have many cells.
How did the microscope help prove the cell theory?
It allowed scientists to see cells for the first time.
What organelle is known as the “powerhouse of the cell” because it produces energy?
The mitochondria
What is the smallest unit of life?
The Cell
Why do experiments need to be replicable?
So other scientists can repeat them and get similar results
What is the main difference between prokaryotic and eukaryotic cells?
Eukaryotic cells have a nucleus; prokaryotic cells do not.
How is a scientific theory different from an everyday theory?
A scientific theory is a well-tested explanation supported by evidence.
What are organelles?
Tiny organs inside cells that perform specific functions
What level of organization comes directly after tissue?
What happens if scientific results are not replicable?
Scientists question the results
Specialized cells working together form which of the following?
Tissues and organ systems
What is the control center of a eukaryotic cell?
The nucleus
What structure controls what enters and leaves the cell?
The cell membrane
Which type of cell does NOT have a nucleus: prokaryotic or eukaryotic?
Prokaryotic
Which experiment would help prove that cells come from preexisting cells?
Observing new cells dividing under a microscope
Give an example of a specialized cell
Muscle cell
Which structures are found in BOTH plant and animal cells?
(hint there are three parts)
Cell membrane, cytoplasm, and nucleus
What is the function of the cell wall, and which cells have one?
It provides support and protection; plant cells have it.
According to the cell theory, all living things are made of what?
Cells
What is a molecule found in the human body?
(Hint I am looking for one very important molecule)
Oxygen
What are the levels of organization in an organism from simplest to most complex?
Cell → Tissue → Organ → Organ System → Organism
what are the three parts of cell theory
1. All living things are composed of one or more cells
2. The cell is the basic unit of structure and function
3. All cells arise from pre-existing cells
Which type of cell has a nucleus, and what is its function?
Eukaryotic cells; it controls the cell’s activities and contains DNA
Name one organ system in the human body.
Digestive system, circulatory system, respiratory system, nervous system