Try for free
DiscoverMobile appPricingFor schoolsHelpLogin
← Back to flashcardsQuick Flashcards

Biology Basics Flashcards

Fundamental biology concepts covering organisms, cells, tissues, organs, systems, energy, homeostasis, and taxonomy.

48 cards~17 min
Biology Basics Flashcards — Qwi
1 / 48

All flashcards in this set

1What is an organism?
Answer

An individual form of life

It refers to any single living entity, distinct from others.
2An {{organism}} is an individual form of life.
Answer

organism

3An organism is a group of cells.
Answer

False

An organism is a single living entity; it may be composed of many cells, but the definition does not state it is a group.
4What is a stimulus?
Answer

Something that causes a response

It is any change that triggers a reaction in an organism.
5A {{stimulus}} causes a response.
Answer

stimulus

6A stimulus is the reaction to a change.
Answer

False

A stimulus initiates a response; it is not the response itself.
7What is a response?
Answer

How an organism reacts to a stimulus

It describes the behavior or physiological change following a stimulus.
8A response is how an organism {{reacts}} to a stimulus.
Answer

reacts

9Response describes the cause of a stimulus.
Answer

False

Response is the effect, not the cause.
10What does growth refer to?
Answer

An increase in mass

Growth means the organism gains more material, leading to larger size.
11Growth is an {{increase}} in mass.
Answer

increase

12Growth is a decrease in mass.
Answer

False

Growth adds mass, not reduces it.
13What is the smallest unit of a living thing?
Answer

Cell

Cells are the basic structural and functional units of life.
14The smallest unit of a living thing is the {{cell}}.
Answer

cell

15Cells are larger than tissues.
Answer

False

Tissues are groups of cells, so cells are smaller.
16What is energy?
Answer

The ability to cause change or do work

Energy enables organisms to perform activities and maintain functions.
17Energy is the ability to cause {{change}} or do work.
Answer

change

18Energy can cause work without change.
Answer

False

Work always involves some form of change.
19What is a tissue?
Answer

A group of specialized cells that perform a particular function

Tissues organize cells to carry out specific tasks.
20A tissue is a group of {{specialized}} cells that perform a particular function.
Answer

specialized

21Tissues consist of a single cell type.
Answer

False

Tissues are made of specialized cells, often of multiple types.
22What is an organ?
Answer

A group of tissues that work together to carry out a set of functions

Organs combine multiple tissues to perform complex tasks.
23An organ is a group of {{tissues}} that work together.
Answer

tissues

24An organ is a single cell.
Answer

False

Organs are composed of multiple tissues, not a single cell.
25What is an organ system?
Answer

A group of organs that works together to perform a set of functions

Organ systems integrate several organs for broader physiological roles.
26An organ system is a group of {{organs}} that works together.
Answer

organs

27Organ systems consist of only one organ.
Answer

False

By definition, an organ system includes multiple organs.
28What is homeostasis?
Answer

The process of maintaining a life-supporting internal environment

Homeostasis keeps internal conditions stable despite external changes.
29{{Homeostasis}} is the process of maintaining a life-supporting internal environment.
Answer

Homeostasis

30Homeostasis refers to external environmental changes.
Answer

False

Homeostasis concerns internal regulation, not external changes.
31What is a domain in classification?
Answer

The highest level of classification of organisms

Domain is the broadest taxonomic rank, grouping all life forms.
32Domain is the {{highest}} level of classification of organisms.
Answer

highest

33Domain is the lowest taxonomic rank.
Answer

False

Domain is the topmost rank, not the lowest.
34What is a kingdom in classification?
Answer

The level of classification of organisms below domain

Kingdom is the second-highest taxonomic rank, directly under domain.
35Kingdom is the level of classification below {{domain}}.
Answer

domain

36Kingdom is above domain in hierarchy.
Answer

False

Domain is above kingdom.
37What is taxonomy?
Answer

The process of identifying and classifying living things

Taxonomy organizes organisms into hierarchical groups based on characteristics.
38Taxonomy is the process of {{identifying}} and classifying living things.
Answer

identifying

39Taxonomy only deals with genetic sequencing.
Answer

False

Taxonomy includes morphological, ecological, and genetic information.
40What defines a species?
Answer

A group of similar organisms that can produce offspring

Species are capable of interbreeding and producing fertile progeny.
41A species is a group of similar organisms that can {{produce}} offspring.
Answer

produce

42Species can interbreed with any other species.
Answer

False

Interbreeding is generally limited to the same species.
43What is a scientific name?
Answer

The two-part name consisting of its genes and species

It uniquely identifies an organism using its genetic and species identifiers.
44A scientific name consists of {{genes}} and species.
Answer

genes

45Scientific names are always three words long.
Answer

False

They are typically two words (genus and species).
46What is a dichotomous key?
Answer

A tool that helps identify natural objects like birds, trees, rocks, fungi, and insects

It uses a series of choices to narrow down the identity of an organism.
47A dichotomous key is a tool that helps its user {{identifying}} natural objects.
Answer

identifying

48Dichotomous keys are used only for classifying microorganisms.
Answer

False

They are used for a wide range of natural objects, not just microorganisms.

Fundamental Biological Concepts

This lesson introduces core ideas in biology, providing clear definitions and correcting common misconceptions. Each concept is presented with its essential meaning and a brief explanation of why certain statements are inaccurate.

What Is an Organism?

An organism is an individual form of life. It refers to any single living entity, distinct from others. Although an organism may be composed of many cells, the definition does not describe it as a group of cells; rather, it emphasizes the individuality of the living entity.

  • False statement: "An organism is a group of cells." – An organism is a single living entity; it may contain many cells, but it is not defined as a group.

Stimulus and Response

A stimulus is something that causes a response. It is any change that triggers a reaction in an organism.

A response is how an organism reacts to a stimulus. It describes the behavior or physiological change that follows the stimulus.

  • False statement: "A stimulus is the reaction to a change." – The stimulus initiates a response; it is not the reaction itself.
  • False statement: "Response describes the cause of a stimulus." – Response is the effect, not the cause.

Growth

Growth refers to an increase in mass. During growth, an organism gains more material, leading to a larger size.

  • False statement: "Growth is a decrease in mass." – Growth adds mass, not reduces it.

Cellular Foundations

The smallest unit of a living thing is the cell. Cells are the basic structural and functional units of life.

  • False statement: "Cells are larger than tissues." – Tissues are groups of cells, so cells are smaller.

Energy

Energy is the ability to cause change or do work. It enables organisms to perform activities and maintain functions.

  • False statement: "Energy can cause work without change." – Work always involves some form of change.

Tissues

A tissue is a group of specialized cells that perform a particular function. Tissues organize cells to carry out specific tasks.

  • False statement: "Tissues consist of a single cell type." – Tissues are made of specialized cells, often of multiple types.

Organs

An organ is a group of tissues that work together to carry out a set of functions. Organs combine multiple tissues to perform complex tasks.

  • False statement: "An organ is a single cell." – Organs are composed of multiple tissues, not a single cell.

Organ Systems

An organ system is a group of organs that works together to perform a set of functions. Organ systems integrate several organs for broader physiological roles.

  • False statement: "Organ systems consist of only one organ." – By definition, an organ system includes multiple organs.

Homeostasis

Homeostasis is the process of maintaining a life‑supporting internal environment. It keeps internal conditions stable despite external changes.

  • False statement: "Homeostasis refers to external environmental changes." – Homeostasis concerns internal regulation, not external changes.

Taxonomic Hierarchy

The highest level of classification of organisms is the domain. Domain is the broadest taxonomic rank, grouping all life forms.

  • False statement: "Domain is the lowest taxonomic rank." – Domain is the topmost rank, not the lowest.

The level of classification below domain is the kingdom. Kingdom is the second‑highest taxonomic rank, directly under domain.

  • False statement: "Kingdom is above domain in hierarchy." – Domain is above kingdom.

Taxonomy is the process of identifying and classifying living things. It organizes organisms into hierarchical groups based on characteristics.

  • False statement: "Taxonomy only deals with genetic sequencing." – Taxonomy includes morphological, ecological, and genetic information.

Species Definition

A species is a group of similar organisms that can produce offspring. Species are capable of interbreeding and producing fertile progeny.

Understanding these foundational concepts provides a solid base for further study in biology and related life sciences.