Select your answer:

Topics:
Neuron Structure Bones Anatomy Enzymes and Metabolic Pathways Cardiovascular System Terminology Nutrient Cycling Circulation of Blood Bacteria Eczema Hematology / Oncology Movement RDA Dental Caries Skull Animal Genetics and Nutrition Immunology: T cell Development Vitamins and MineralsOther quiz:
Fungi/Bacteria/Biotechnology › ViewBacteria that help break down dead material in the environment are called
A. vaccines
B. decomposers
C. methanogens
D. halophiles
Life Processes › View
what is the purpose of circulation
A. supply O2 and nutrients and remove waste
B. break down the food
C. get oxygen into the lungs
D. remove solid waste