Biology 11

Mr. Halley

Classroom Expectations – Room 315

RESPECT attend be prepared be on time use technology appropriately be an active learner ask for help when needed communicate work hard be nice

Life Processes

Biology 11

Characteristics of Living Things Highly organized, containing many complex

chemical substances Composed of one or more cells Use energy Possess definite form and limited size Have a limited life span Grow Respond to changes in their environment Reproduce Groups of living things evolve

Metabolism

The sum of all chemical reactions that occur in the cells of a living thing.

Metabolism = anabolism + catabolism

Anabolism

Definition: The chemical process of building a more complex substance.

Examples: Photosynthesis Protein synthesis

Catabolism

Definition: The chemical process of breaking down a more complex substance.

Examples: Cell respiration Chemical digestion

Nutrition

Three stages: Ingestion

Digestion

Egestion

Reproduction

Asexual SexualReproduction involving one parent, offspring is genetically identical to parent.Examples:

-Cell division (mitosis)

-Budding

-Regeneration

Reproduction involving two parents, offspring is a genetic mix of both parents. Increases variationInvolves gametes (sex cells)

Q: Why does your stomach growl?

A: Discovery Health Article

Respiration

The exchange of gases between cells and the environment.

Two types: Aerobic – requires oxygen Anaerobic – does not require oxygen

Response

The ability of an organism to detect and react to changes (stimuli) in its environment in order to maintain homeostasis.

Homeostasis: the maintenance of a steady internal state despite changes in the internal and external environment.

Energy and Life

Notes

Adaptations

A physical feature or behaviour that makes an organism better suited to its particular environment.

Three types: Reproductive Defensive Nutritional