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.

On a tree, where would the vascular tissue be found?

Purple loosestrife is a beautiful, long-stemmed wetlands species brought to the United States from Europe as an ornamental plant. In the U.S. it has no predators and out competes another species of wetland grass, Cattails, which is a valuable resource for many species. This is an example of:

__________________ is a process in angiosperm plants in which two sperm are required to fertilize the contents of the embryo sac.