OC88780

The basic model, partitions risk assessment into four steps: hazard identification, dose-response modeling, exposure assessment and risk characterizati

But the question is what type and how much radiation is there. Even if we are walking outside in the woods, we are still exposed to some radiation, bec

No specific definition; however some are defined by molecular weight or density; some are mixed in terms with trace elements. They can be extracted fro

Smoking and driving are much more dangerous then exposures to low levels of. The electromagnetic spectrum is divided into three segments with visible l

Background radiation it is natural radioactivity in the earth and by cosmic rays from outerspace. It can lead to mutation but does not usually cause ha

Not enough energy to displace electrons from the atoms. This radiation does cause harm, but that harm is not obvious. It is a subject of debate and res

Human usage: withdrawal total amount of water removed from a river, lake or aquifer for any purpose. In 2025, humans would have consumed 70%-90% of ava

What are some of the factors in the environment that influence our health: there are direct and indirect factors : chemical (e. g. organic and inorgani

Your environment is your health, but not the only factor influencing your health. Genetic material can influence our health; influences what we are imm

Voc (volatile organic compounds) + nox + heat + sunlight = ozone. Can be pollutant if formed on ground level (bad) but contributes to the protection fr

Virus are so tiny, they can get around water filtration systems and cause diarrhea. Only hepatitis a causes a different reaction from most viruses (e.

Population densities can be estimated from samples: estimating population densities is easiest for sedentary organisms, counting mobile organisms is mu

Ecology: scientific study of the rich and varied interactions between organisms and their environment. Communities: embracing all the organisms living

Biome is a terrestrial environment defined by the growth forms of its plants. Species richness the number of species present in its communities. Temper

Communities are loose assemblages of species: ecological communities are not assemblages of organism that move together as units when environmental con

Measuring heritable variation: basic tenets of darwin"s theory of evolution by natural selection: The first step in a quantitative genetic analysis is

For 14c, production in the upper atmosphere is about equal to its natural decay. The waste product is o2: one lineage of these oxygen-generating bacter

A progression of indirect effects across successively lower trophic levels trophic cascade. Trophic cascades may have effects across multiple and very

Climate important, but other factors (soil fertility, fire) influence structure+vegetation of area. A species found only within certain regions is ende

The jurassic (200-145 mya: two large continents: laurasia (laurentia (= na) + eurasia) & gondwana (after region in. The cretaceous (145-65 mya: gondwan

Responses to the environment must be timed appropriately. Animals must find their way around their environment. Piloting: orientation by landmarks most

What questions do biologists ask about behaviour: ethology: the study of animal behaviour from an evolutionary perspective. For many animals, much of t

Social behaviour evolves when, by cooperating, conspecifics individuals can achieve higher rates of survival and reproduction than they would if they l

Dissociative amnesia: when a person is unable to recall important personal information, usually after some stressful episode. The information is not pe

Bulimia nervosa binges. concepts and moods and social perception. Bulimia from a greek word means ox hunger. This disorder involves episodes of rapid c

Zakzanis; conclusion tha the specific role of deficits in the temporal lobes has been overstated and that more diffuse dysfunction exists. Mri studies

The diagnoses of these two disorders share several clinical feautures the most imp being an intense. Co-twins of patients diagnoses with a. n for ex ar

Cognition: groups together the mental processes of perceiving, recognizing, conceiving, judging and reasoning. Cognitive paradigm: focuses on how peopl