All about cells.
Which organelle is the control center of a cell?
What is nucleus.
Unlike Hooke, Leeuwenhoek observed cells that?
What is were alive.
This part of the cell controls which substances enter and leave the cell?
What is the cell membrane.
Sugars and starches are examples of organic compounds known as?
What term refers to the movement of molecules from an area of higher concentration to an area of lower concentration?
What is diffusion.
What is the function of a cell wall?
what is to protect and support the cell.
How does magnification occur in an electron microscope?
What is an electron beam creates an image.
This term refers to the movement of materials through a cell membrane without using the cells energy?
What is passive transport.
The diffusion of _______ molecules through a selectively permeable membrane is called osmosis.
What is water.
Which organelles stare food and other materials needed by the cell?
What is vacuoles.
Specialized cells are found only in
What is many-celled organisms.
The invention of the microscope made it possible for people to discover what?
This term refers to the movement of materials through a cell membrane when the cells energy is required?
What is active transport.
Enzymes are important because they
What is speed up chemicals reactions.
Which organelles releases chemicals that break down large food particles into smaller ones?
What is lysosomes.
What is the function of mitochondria?
What is they convert energy from food molecules into energy the cell can use.
What does the term resolution refer to?
Unlike the cell wall, the cell membrane
Sugar molecules can combine with one another to form large molecules called
What is starches.
Small grain like bodies called___________________ produce proteins inside cells.
What is ribosomes.
Cells in many-celled organisms
a. all look the same
b. all have the same structure
c. are often quite different from each other
d. are the same size in every part of the organism
What is c: are often quite different from each other.
A microscope allowed Hooke to see "tiny rectangular rooms," which he called
What is cells.
Which of the following statements is part of the cell theory?
a. only plants are composed of cells
b. all cells are produced from other cells
c. cells can be produced from nonliving matter
d. cells are one of several basic units of structure and function of living things.
What is B.
DNA belongs to the group of organic compounds known as
What is nucleic acids.
A ____________ is a group of similar cells that work together to perform a specific function.
What is tissue.