If a pollutant, like DDT, is eaten by zooplankton in the sea, that are then consumed by small fish, that are consumed by larger fish, that are consumed by eagles. This causes the concentration of DDT in the blood of these animals to get higher as you work our way up the food chain. This is an example of:

Which of the following is not a way that humans have increased the carrying capacity for their species?

keystone species.png  Use the graph to answer the following question: What does the graph tell you about the effect of a keystone species?

nitrogen cycle.png Use the figure to answer the question. Consider the global nitrogen cycle depicted in the figure. What is the limiting portion of the cycle for plants?

An incremental lowering of standards that results with each new generation lacking knowledge/observation of the historical (or previous) condition of the environment being observed describes:

What is the purpose of a swim bladder in fish?

carrying capacity.png According to the figure above, the carrying capacity for fruit flies in the environment of the culture bottle is ________________.

The hypothalamus detects fluctuations in temperature. The receptors on it are known as thermoreceptors. Skin also possesses thermoreceptors which can detect the temperature of the external environment. This information is relayed to the hypothalamus which can in turn transmit nerve pulses for corrective mechanisms to occur. If you are HOT, sweating and vasodilation occurs. If you are COLD, vasoconstriction and shivering occur. In extreme cold, blood flow to extremities decreases in order to protect internal organs. This is an example of:

What is unique about adult amphibians’ respiratory system?

________use chemicals from the environment (like deep-sea vents) to make their food.