Exam 2: Science, Matter, Energy and Systems

Within some DNA molecules are certain sequences of nucleotides called

An example of kinetic energy is ____.

Which of the following energy forms is low quality?

The idea that all elements are made up of molecules is called the atomic theory.

Describe the three major types of organic polymers important for life. Give examples of why at least two types are important.

A positive feedback loop ____.

A classmate tells you that a statement heard on the news about an environmental process noted in a local ecosystem cannot be true because it has not been scientifically proven. Given what you know about the nature of scientific reasoning, you realize that ____.

Narrative: (questions 9 and 10) A tiny, tawny colored butterfly called the Carson Wandering Skipper was always known for its small and very localized populations. Typically, it was found along the western Nevada and eastern California high desert areas. It was always located close to hot springs and other wet areas that supported saltgrass, the host plant it depended on. Recently, the populations went into a steep decline, and a last hold-out area was threatened by imminent construction of a freeway bypass. Biologists became alarmed and began an intensive search for populations in locations other than the spot designated for the freeway bypass. They began their search by identifying all known locations of hot springs, in hopes of finding small populations of the Carson Wandering Skipper close by. The biologists' observations that the Carson Wandering Skipper populations had declined is an example of ____.