unit 8 exam study

The estimated maximum volume of oil spilled during the deepwater horizon spill would be approximately

190 million gallons

The Clean Water Act was passed in _____

1972

What is the LD 50 for this curve

20mg

The percentage of coastline along the gulf that was directly affected by the Deepwater Horizon spill was

37%

What could be an unplanned disadvantage to spraying pesticides to kill mosquitos?

AN unplanned disadvantage can be that you can kill other insects by spraying it because it an be blown by the wind into other areas cause you are spraying it outside your house or insects can come by and also die while you are spraying it.

The supposed vector for Ebola was

Bat

A toxin that is absorbed faster than it is excreted is an example of

Bioaccumulation

Persistent Organic Compounds all contain ________.

Carbon

Which organism would be a good indicator species showing that the pH had changed from 5.8 to 5.2

Crayfish

Which of the following best describes why DDT is classified as a POP?

DDT is very stable and as much as 50% of the original concentration can remain in the soil 15 years after the initial application

Which of these is NOT an ecological service provided by wetlands?

Energy generation

Persistent organic chemicals are mosty

Fat Soluble

Which of the following examples includes both a point and a non point source of pollution

Fertilizer from suburban lawns and wastewater from a water treatment plant.

Which of these is not a hormone?

Hemoglobin

An ________ in temperature causes a ______ in dissolved Oxygen

Increase, Decrease

Which of these best describes the action of an endocrine disruptor?

It blocks the receptor protein binding site of a hormone so the cell cannot receive a signal

What is the dependent variable in this experiment?

Length of root

Which nutrient causes these dead zones?

Nitrogen

Which of the following best describes a way that persistent organic pollutants cause harm in the environment?

POP's are soluble in fat, so they accumulate in an organisms' fatty tissues

Only in the optimum range of tolerance organisms would be able to _________.

Reproduce

What is the independent variable in this experiment?

Salt concentration

Which of these is NOT a point source pollution

Salt on roadways dissolving into a creek

Describe how a population of trout will be impacted by an increase of temperature in their stream

The population of traut will be decreasing/impacted because an increase in tempuature is a decrease in disolved oxygen ans disolved oxygen is nessasary for aquadic animals.

What is the control group

Those seeds NOT exposed to the salt water.

What is the experimental group

Those seeds exposed to the salt water

Factors that increase the spread of infectious disease include all of the following, EXCEPT

exposure to neurotoxins, which affect the endocrine system