Unit Two: Characteristics of Living Things

Metabolism

Failure to maintain homeostasis

• 1. Autotrophs
• 2.Heterotrophs

It is carried out by plants, algea and blue-green bacteria( autotrohs). It takes the radiant energy of the sun and puts it in the bonds of sugar molecules. PHOTOSYNTHESIS occurs mostly in the CHLOROPLAST of PLANT CELLS.

Stomates

it's small holes in their leaves that let them exchange the gasses used in photosynthesis.

they open and close the stomates

Organisms get energy by breaking the bonds of sugar molecules. The released energy is used to make a molecule of ATP, which gives all organisms their energy. -Takes place in the mitochondria

requires oxygen, and more ATP(energy) for a molecule of sugar than anaerobic (no oxygen) respiration.

movent of molecules from high concentration to low concentration which requires no energy( passive transport)

requires the use of energy, usually moving molecules from a low to high concentration( against the flow of diffusion)

thediffusion of water into or out of the cell.

• 1. Nervous System
• 2. Endocrine System

a change in the environment that you RESPOND to

A NERVE CELL

the pancreas

in the liver