Reproduction
What are the types of reproduction?
Asexual reproduction.
Sexual reproduction.
What is DNA?
Genetic information
Determines the inherited characteristics.
What are golgi bodies?
Packages up and moves materials our of the cell.
What is Replication?
Before mitosis
Nucleus makes a copy of itself
there are two sets of DNA in the cell.
What is Metaphase?
Tugging action of the spindle fibres pulls the chromosomes into a line across the middle of the cell.
What is the basic unit of life?
What is the cell.
What is Chromatin?
Long strands of DNA that is scattered through the nucleus
What are vacuoles?
Fluid filled
Contains water, food, wastes and othe materials.
What is a Chromosome?
Long double strands of DNA held together by a centoromere.
What is anaphase?
Spindle fibres begin to contract and shorten
Centromere is pulled apart
Chromosome strands move to opposite ends of the cell
What are the four points of the Cell theory?
All living organisms are composed of one cell.
Cells are the basic units of life
All cells come from previously existing cells
The activity of an organism depends on the activity of its independent cells.
What is the Nucleolus?
Darker area within the nucleus that manufactures ribosome parts.
What are Lysosomes?
Break down food and digest wastes and worn our cell parts.
What are the four stages of mitosis?
Prophase
Metaphase
Anaphase
Telophase
What is telophase?
Final phase of mitosis
One set of chromosomes are at each end
Spindle fibres disappear
Nuclear membranes and nucleolus reappear
Two nuclei are in one cell
Cell is ready to divide
What is an organelle?
Specialized structures that perform specific functions in the cell.
What are Ribosomes?
Contributes to the making of substances important for cell function.
What two structures do a plant cell have that an animal cell does not have?
Cell Wall
Chloroplasts
Explain prophase?
Chromosomes contrast
Nucleolus and nuclear membrane disappear
Spindle fibres begin to from and attach to the centromere
Why do cells die?
They are programmed genetically to do so.
When they are no longer needed.
Cannot function normally
Damaged
Not receiving enough food or oxygen.
What is the nucleus?
Its the brain of the cell
It controls all the cell functions , stores information and instructions.
What is the cell membrane?
Selectively permeable structure enclosing the cell contents.
Controls the movement of materials in and out of the cell.
What is Mitosis?
The process by which a cell divides to make two identical daughter cells.
What are Centrioles?
make the spindle fibres and pull the chromosomes to opposite ends of the cell.
What is Regeneration?
The process of repairing injured cells or the making of lost body parts.