Exam 1: Humans in the World of Biology

When making scientific decisions in one's life, it is best to ask questions, gather and evaluate information and evidence, and carefully consider the sources of the material. This process is called ________.

Cells that possess a nucleus and a membrane system that establishes internal compartments belong in which of the following groups?

A statement such as "If human body temperature increases to a certain level, then critical proteins will be denatured" would most likely be associated with ________.

List and briefly explain the organization of life, beginning at the molecular level and continuing through the biosphere.

Which statement is incorrect?

________ is the ability to maintain a relatively constant internal environment.

Living organisms are members of all of the levels listed; however, rocks are components of ________.

A(n) ________ is a group of similar cells that perform the same function.

________ reasoning involves gathering facts that lead toward a logical generalized statement or conclusion.

The smallest functional unit of life is known as a(n) ________.

In a double-blind experiment, ________.

Members of the domains Bacteria and Archaea are called ________ because they lack a nucleus and internal compartments.

A particular virus consists of only DNA and proteins. Viruses attach to the surface of a host cell and inject the viral DNA into the host. The host cell then copies the viral DNA and makes new viruses. Eventually, the host cell is killed, and the new viruses are released. These new viruses search for new hosts to continue the cycle. Identify and apply at least three characteristics of life to justify whether a virus is a living thing.

Which process used to solve problems in science involves accumulating facts through observation until the evidence leads to a general statement about nature?

Humans belong to which of the following domains?

A community and its physical environment are often referred to as a(n) ________.

A scientist discovers an unidentified organism that is composed of multiple cells and has a membrane-bound nucleus. Of the choices listed, the most likely classification would be ________.

You are classifying an organism and trying to determine to which domain it belongs. The organism is unicellular and was isolated from a very unusual environment. This organism probably belongs in which domain?

Lately, many claims concerning the health benefits of green tea have appeared in the news. Suppose you read a claim that says drinking green tea causes weight loss. The information provided states that participants were weighed at the beginning of the study, were then asked to drink 2 cups of green tea every day for 6 weeks, and finally were weighed at the end of the study. Participants who drank the tea for 6 weeks seemed to have lost some weight by the end of the study, so the researchers concluded that green tea is helpful for weight loss. This study has some obvious holes in it. Explain three things that could be done to improve the design of this study. Do not assume any information other that what has been provided.