Science Quarterly for Quarter 2 in 2012

Structure in a cell where cellular respiration takes place

The "burning" of food to RELEASE energy for the cell to use

• Producers (plants) make their food.

sugar use as a fuel for cells

Program of Life

A structure that houses DNA (genes)

• (46 in a human non-sex cell)
• (23 in a human sex-cell)

A section of DNA that is a chemical code for something a cell needs

Male sex cell

Female sex cell

Reproduction that does NOT involve two parents

Asexual reproduction- parent does NOT split into two equal parts

Sperm joins an egg cell

• one cell becomes two
• Parent cell doubles its chromosome number temporarily and then the two daughter cells get same number of chromosomes as the parent cell

The stages of development of an organism

A life cycle in which young do not look like their parents

Organism that make their food.

Organism that has to get their food.

Plant Eater

Meat Eater.

eats plants and meat.

hunter

hunted

eats what it did not kill

Bacteria and Fungi. Breaks down the remains of dead organisms.

Feeding place in food chain.

Who eats whom

Diagram that shows all possible food chains in a given area

Diagram that shows the amount of energy and numbers of organisms at each feeding level

The movement and accumulation of a toxin (poison) in a food chain.

Highest consumer order in a food chain

• Cannot be created (made) or destroyed- just transformed (changed from one form to another)
• Example: Sunlight energy changed to chemical (food) energy
• Example: Food energy changed to heat energy.
• Energy CANNOT be recycled. Only matter can be recycled

A method to identify an organism by choosing between two statements

Results from two seperate egg cells and sperm cells

One egg is fertilized by one sperm but then splits into two cell masses

Surrounds and protects nucleus

Structure that seperate chromosomes during cell division

Abnormal cell division. Cells dividing out of control

Contains chlorophyll to make food in plant cell