Study Guide Life Science Unit 1

New medication undergo extensive human testing before receiving FDA approval. These tests represent an experiment, and variation is in the given to participants represents

Independent Variable

A scientific hypothesis must be constructed with which of the following characteristics?

It provides a reasonable explanation to a question and is consistent with current observations; it must also be testable and falsifiable

Which of the following is LEAST likely to include unchecked bias when

Peer-reviewed scientific journals

A researcher studying a group of individuals of the same species living and interacting in a shared environment is said to be working at the level of a

Population

Based on the scientific evidence presented in the journals Lancet and Vaccine which of the following is NOT the reason for the observed increase in incidence of autism in the United States and other countries since the 1970s?

The MMR vaccine is being more broadly administered, so more children are getting autism

What characteristic is not a shared by all living organisms?

They make their own energy

Is it important for scientist to communicate their results to fellow scientists?

Yes. The quality and accuracy of the scientific work can be enhanced by input, further review, and possibly even repetition by other scientists working in the same field.

A tissue is defined as

a group of cells that performs a unique set of tasks in the body

Which of the following sequence correctly represents the biological hierarchy of a multi-cellular organisms?

cells -> tissues -- organs ---> individual

A small, potentially living object was found. For this object to be considered alive, the object must

contain one or more cells.

A group of bats that were "sham injected" represents a ______________ group

control

Living organisms maintain a constant internal environment by sensing and responding to their internal conditions. This stable maintenance of internal conditions is known as

homostasis

Because all scientists have bias what is done to research?

it is peer reviewed before adding it to existing knowledge

Carbon, hydrogen, and oxygen atoms are held together by chemical bonds to form ______ of sugar.

molecules

A scientific hypothesis must be __________________; if not, science cannot evaluate it.

testable