Exam 1: Introduction: Themes in the Study of Life

A water sample from a hot thermal vent contained a single-celled organism that had a cell wall but lacked a nucleus. What is its most likely classification?

A common form of regulation in which accumulation of an end product of a process slows that process is called positive feedback.

Evolution is biology's core theme that ties together all the other themes. This is because evolution explains

A filamentous organism has been isolated from decomposing organic matter. This organism has a cell wall but no chloroplasts. How would you classify this organism?

What is a hypothesis?

All the organisms on your campus make up

Which of the following best describes the logic of hypothesis-based science?

For most ecosystems __________ is (are)the ultimate source of energy, and energy leaves the ecosystem in the form of __________.

Organisms interact with their environments, exchanging matter and energy. For example, plant chloroplasts convert the energy of sunlight into

In a hypothetical world, every 50 years people over 6 feet tall are eliminated from the population. Based on your knowledge of natural selection, you would predict that the average height of the human population will

Through time, the lineage that led to modern whales shows a change from four-limbed land animals to aquatic animals with two limbs that function as flippers. This change is best explained by

A controlled experiment is one in which

Which of the following best demonstrates the unity among all organisms?

Which of the following types of cells utilize deoxyribonucleic acid (DNA)as their genetic material but do not have their DNA encased within a nuclear envelope?

Once labor begins in childbirth, contractions increase in intensity and frequency until delivery. The increasing labor contractions of childbirth are an example of

Collecting data based on observation is an example of __________; analyzing this data to reach a conclusion is an example of __________ reasoning.

Which of these provides evidence of the common ancestry of all life?

Two species that belong to the same genus must also belong to the same

Protists and bacteria are grouped into different domains because

Discovery science uses inductive reasoning to derive generalizations from a large number of specific observations.