Biology Chapter 1: Quiz study topics

What are the major characteristics of life?

Different molecular composition, require energy & raw materials, composed of cells, maintain homeostasis, respond to external environment, grow & reproduce, populations evolve.

What does it mean that living things have a different molecular composition?

Living things are made of molecules arranged differently from nonliving things.

Why do organisms require energy and raw materials?

To survive, grow, and function.

What is the basic unit of life?

Cell.

What is homeostasis?

The maintenance of relatively stable internal conditions.

How do populations evolve?

Populations change over generations, not individual organisms.

What are the three domains of life?

Bacteria, Archaea, Eukarya.

What distinguishes prokaryotic cells from eukaryotic cells?

Prokaryotic cells have no membrane-bound nucleus; eukaryotic cells do.

What are the four kingdoms of Eukarya?

Protista, Plantae, Fungi, Animalia.

What is the classification of humans (Homo sapiens)?

Domain: Eukarya, Kingdom: Animalia, Phylum: Chordata, Class: Mammalia, Order: Primates, Family: Hominidae, Genus: Homo, Species: Sapiens.

What are the defining features of humans?

Bipedalism, large brain, complex language, opposing thumbs.

What does bipedalism refer to?

The ability to stand upright and walk on two legs.

What is the significance of a large brain in humans?

Humans have a relatively large brain compared to body size.

What is the scientific method?

A systematic approach to understanding the natural world through observation, hypothesis formulation, experimentation, and analysis.

What is the first step of the scientific method?

Observe and generalize.

What is a hypothesis?

A tentative statement about the natural world that can lead to testable deductions.

What are the levels of biological organization from smallest to largest?

Atom, molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

What is the difference between a population and a community?

A population consists of members of the same species, while a community consists of different populations living and interacting in the same area.

What is an ecosystem?

A community plus its nonliving environment.

What is the biosphere?

All ecosystems on Earth / the part of Earth where life exists.

What is a testable prediction based on a hypothesis?

A specific statement that can be tested, often written in an IF → THEN format.

What is the difference between inductive and deductive reasoning?

Inductive reasoning goes from specific observations to general conclusions, while deductive reasoning applies general principles to specific cases.

What should you do if your prediction is false?

Modify the hypothesis.

What is an independent variable?

The variable that the researcher intentionally changes or manipulates.

What is a dependent variable?

The response or change that is measured as a result of changing the independent variable.

What is the purpose of a control group in an experiment?

To provide a baseline for comparison against the experimental group.

What does the term 'homeostasis' refer to?

The ability of an organism to maintain a stable internal environment.

What is the major difference between prokaryotic and eukaryotic organisms?

Prokaryotic organisms lack a nucleus and membrane-bound organelles, while eukaryotic organisms have them.

What is bipedalism?

The ability to walk on two legs, a defining feature of humans.

What is the scientific name for humans?

Homo sapiens.

What are the seven characteristics of life?

Growth, reproduction, response to stimuli, adaptation, metabolism, homeostasis, and cellular organization.

What is the largest level of biological organization?

Biosphere.

What is an experiment?

A carefully planned procedure designed to test a prediction based on a hypothesis.

What does it mean for a hypothesis to be supported?

It means that the hypothesis has received evidence in favor but has not been proven true.

What is the difference between a community and an ecosystem?

A community is made up of living organisms, while an ecosystem includes both living organisms and their physical environment.

What is the importance of opposing thumbs in humans?

They allow for a greater range of motion and dexterity, enabling complex tasks.

What is the purpose of using active recall in studying?

To enhance memory retention by actively retrieving information rather than passively reviewing notes.

What should you do if your experiment does not support your prediction?

Reevaluate your hypothesis and conduct further testing.

What is the format for writing a testable prediction?

It is often written as an IF → THEN statement.