Short Answer: Please answer ONLY one question from the following pair of questions about the greenhouse effect/water OR the El Nino. 23.  Without the greenhouse effect the average temperature of Earth would be -18 oC instead of the current 15 oC (and rising!). Explain how the composition of the atmosphere and the Sun’s light rays interacting with Earth’s surface make life on our planet possible due to that lovely 15 oC. OR 24.  You are either (1) a rice farmer on a remote Indonesian island OR (2) a coastal fishermen in Chile. Describe the general process of the El Niño Southern Oscillation (ENSO). Identify your perspective/career and then explain how ENSO ultimately impacts your economic success.    

Attachment theory was influenced heavily by the work of Freud and other psychoanalytic theorists.

  Question：去菜市场，走路能到吗？

What is a drug called that fully occupies a receptor and prevents the drug from acting?

Lykken contended that psychopaths have a low fear quotient.

In 2019, Hurricane Dorian had a significant impact on the Bahamas, which are located at about 25° North. As Hurricane Dorian moved, from which way would the storm be directed by the prevailing winds due to the interaction of the Coriolis Effect with an atmospheric cell?

Lab5.pdf lab5.h

Explain how myelination of axons increases action potential conduction speed. There are 2 major mechanisms here. Explain both.

A rancher brings a group of cattle to a patch of temperate grassland to graze for a few days before moving on to a new area. When he returns a few months later, he notices that the grassland has several more species of sedges and flowering weeds than he remembered before, but the purple needle grass is still by far the most popular species. Which of the following statements explains the rancher’s observation?

Short Answer: Please answer ONLY one question from the following pair of questions about food webs OR the nitrogen cycle. 21.  Deciduous and boreal forests were cleared for agriculture in the NE USA during the 18th and 19th centuries but have since recovered. Forests are productive ecosystems with complex food webs. (i)    Complete the diagram of the wetland food web below by drawing arrows or providing a description that shows the possible directions of energy flow. The Sun!! (ii)    Explain why it takes many hectares of forest to support a pair of owls. OR 22. Nitrogen is an essential molecule in organismal proteins and nucleic acids. Fortunately, 78% of the atmosphere is composed of nitrogen gas. Unfortunately, none of this nitrogen is biologically available to you.      (i) Explain how nitrogen gets from the atmosphere into plant and animal tissues.     (ii) Florida is often deals with widespread toxic algae blooms, called Red Tides, that are causing mass fish kills in coastal marine ecosystems. Describe how human alterations to the Nitrogen Cycle could cause these algae blooms in waters off the coast of Florida.