Ecology Exam #3

general term for nutritional imbalances caused by lack of specific nutrients

do not get recommended number of calories

do not get enough protein (essential amino acids)

species that cause disease, transmit pathogens, compete with humans for food, threaten health/well being of humans

lowest pop density of pests that will cause economic damage or level where control costs justified based on damage due to pests

development of high productivity varieties of crops with high yields, supported byincreased use of fertilizers, pesticides and irrigation

mixed strategies of smaller scale production of crops with reduced reliance on chemicals, includes crop rotation, mixed cropping etc.

contour farming, terracing, strip cropping, no till cultivation

state of complete physical, mental, social well being

abnormal change in bodys condition that impairs important physio or psycho functions

focuses on factors that cause disease in the world in which we live

those which not previously known or that have been absent for at least 20 years

diseases which infect domestic animals and wild life

poisonous

substance which can be poisonous causing adverse effects on organisms or systems

"science of poisons" study of adverse effects on external factors of an organism or system

environmental chemicals, drugs and diet as well as physical factors like ionizing radiation, uv light

interactions, transformation, fate and effects of toxins in the biosphere, including individual organisms, pops and whole ecosystems

substances that activate the immune system and cause allergic reactions

headaches, allergies and chronic fatigue caused by poorly vented indoor air contaminated by various contaminants

special class of metabolic poisons that specifically attack nerve cells (neurons)

agents, such as chemicals and radiation that damage or alter genetic material (dna) in cells

chemicals or other factors that specifically cause abnormalities during embryonic growth and development

substances that cause cancer

chemicals that interrupt the normal endocrine hormone functions

probability of harm times the probability of exposure if that chemical is released into the environment

determine chances that something harmful or undesirable will occur when exposed to some chemical or activity