Exam 1: Introduction to Biological Concepts and Research

Scientists that focus on the small, individual parts of a living system are using a(n) ____ approach.

A group of similar species that share recent common ancestry is a(n) ____.

Much of our understanding of how large organisms respond to environmental variation is based on observations of model species.

It is through ____ that we further our knowledge of living things.

Emergent properties are ____.

The sequential stages through which individuals develop, grow, maintain themselves, and reproduce are collectively known as the ____.

Why do scientists use model organisms?

Explain the need for a null hypothesis, especially in ecology and evolution. What does a null hypothesis accomplish?

The science of ____ explains the origin and persistence of life, and studies the changes in living things.

When conducting descriptive research, a scientist primarily uses ____.

Within an organism, all cells have the same ____, whereas different cell types contain different ____.

Mutations are ____.

Internal body temperature in humans is regulated primarily by behavioral mechanisms.

A student encounters an organism that resembles a plant and whose cells contain a nucleus. The organism is most likely classified as a(n) ____.

Shitake mushrooms are decomposers that break down biological molecules from dead organisms. These organisms belong to the ____ kingdom.

Favorable mutations may produce adaptations .

Although Darwin and Wallace understood the central importance of heritability among organisms to the process of evolution, they could not explain how new variations arose or how they were passed to the next generation.

Which pair of organisms would be classified as prokaryotes?

The highest level of the hierarchical classification of life is the ____.

Populations can be described in terms of their diversity and stability.