What makes something alive?

Notes Biology life processes.notebook

Welcome to Regents Biology! Mrs. O'Brien Office: 132

September 12, 2017

Sep 912:07 PM

What makes something alive?

Observe the objects on the lab table. Is it alive? What makes you say so? Make a chart. Write down what you see and your observations. Why is it alive or not?

Sep 101:31 PM

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Notes Biology life processes.notebook

September 12, 2017

Biology: The study of life, living organisms, and their interactions with other organisms and the environment.

Characteristics of Living Things

made of cells use energy need water maintain homeostasis in a changing environment react and respond to changes in the environment get rid of wastes that they make (metabolic wastes) their cells contain DNA that can be passed on to the next generation reproduce Interact with and effect the environment and other organisms. populations of organisms change over time (evolve)

Sep 101:43 PM

Life Processes Life processes are biological/cellular activities that maintain homeostasis, keep the organism alive and propagate the species.

The life processes are metabolism, nutrition, transport, cellular respiration, synthesis, excretion, regulation, growth & development and reproduction.

Sep 101:48 PM

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Notes Biology life processes.notebook

September 12, 2017

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1. Metabolism includes all the chemical reactions that maintain

homeostasis. These metabolic (chemical) reactions occur in all

the other life processes.

Sep 119:49 AM

Nutrition

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The process of obtaining food and processing the food for use by the organism.

Two types:

Heterotrophic Nutrition

Consuming other organisms or pre-made organic molecules.

Steps: ingestion, digestion, absorption, egestion

Autotrophic Nutrition

Producing organic molecules from inorganic molecules

Photosynthesis uses energy from the sun.

Chemosynthesis uses energy from chemicals (other molecules)

Sep 1112:21 PM

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Notes Biology life processes.notebook

Transport

Absorption of materials and movement of materials around inside a cell and inside and organism. Circulation or cyclosis.

September 12, 2017

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Sep 1112:27 PM

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Cellular Respiration

Releasing ENERGY from food for use by the organism or cell. Two types: Aerobic and anaerobic

Sep 1112:27 PM

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Notes Biology life processes.notebook

September 12, 2017

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Synthesis

The metabolic process that combines small molecules to build larger molecules.

Small molecules (monomers) are combined (bonded) to form larger molecules (macro molecules)

Small molecules

Complex molecules

Sep 1112:27 PM

Excretion

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Getting rid of metabolic wastes

Sep 1112:28 PM

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