Unit 1 - Characteristics, Classification & Features of Organisms
24 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the 'R' in MRS GREN stand for?

  • Repulsion
  • Recycling
  • Respiration (correct)
  • Regeneration

Which statement best defines a species?

  • A collection of all organisms in a particular habitat
  • A classification that includes both plants and animals
  • A type of organism that only exists in a specific environment
  • A group of organisms that can reproduce to produce fertile offspring (correct)

What is the primary purpose of excretion in living organisms?

  • To aid in reproduction
  • To provide energy for growth
  • To eliminate waste and toxic materials (correct)
  • To facilitate movement

Which feature is NOT characteristic of mammals?

<p>Laying eggs (C)</p> Signup and view all the answers

In the binomial nomenclature system, how are names formatted?

<p>Genus is capitalized followed by species in lowercase, both in italics (B)</p> Signup and view all the answers

Which of the following is a process crucial for growth in organisms?

<p>Increase in cell number or size (A)</p> Signup and view all the answers

Which characteristic involves the ability to respond to environmental stimuli?

<p>Sensitivity (D)</p> Signup and view all the answers

What was the main contribution of Linnaeus to the classification of organisms?

<p>Creating the binomial system for naming organisms (C)</p> Signup and view all the answers

What is the first step in the classification system of living organisms?

<p>Kingdom (A)</p> Signup and view all the answers

How does a dichotomous key assist in identifying organisms?

<p>By using a series of questions about features (C)</p> Signup and view all the answers

What does the term 'dichotomous' refer to in the context of keys for identifying organisms?

<p>Branching into two options (C)</p> Signup and view all the answers

What has allowed scientists to classify organisms with a more scientific approach than morphology and anatomy?

<p>DNA sequencing technology (C)</p> Signup and view all the answers

Which statement is true regarding DNA sequences among species?

<p>More similar base sequences mean more closely related species (B)</p> Signup and view all the answers

What is one characteristic that all mammals share?

<p>They feed their young with mammary glands (C)</p> Signup and view all the answers

Which kingdom is the most fundamental classification level for living organisms?

<p>Monera (D)</p> Signup and view all the answers

What role did microscopes play in the classification of organisms?

<p>They allowed detailed observation of organisms (D)</p> Signup and view all the answers

Which of the following characteristics is true for all animals?

<p>They are multicellular organisms (C)</p> Signup and view all the answers

Which structure is a distinguishing feature of vertebrates?

<p>Presence of a backbone (A)</p> Signup and view all the answers

What is a primary nutritional mode of fungi?

<p>Saprophytic or parasitic nutrition (B)</p> Signup and view all the answers

Which feature is common in all plants?

<p>Some parts contain chlorophyll (C)</p> Signup and view all the answers

How do flowering plants reproduce?

<p>Sexually by means of flowers and seeds (D)</p> Signup and view all the answers

Which of these groups includes organisms that do not have a nucleus?

<p>Prokaryotes (C)</p> Signup and view all the answers

What is a defining feature of dicotyledons?

<p>They have an ovary producing seeds inside (B)</p> Signup and view all the answers

Which characteristic is used to classify invertebrates?

<p>Presence or absence of legs (B)</p> Signup and view all the answers

Flashcards

Sensitivity

The ability of an organism to detect and respond to changes in its environment.

Nutrition

The process by which organisms take in nutrients for energy, growth, and development.

Respiration

The breakdown of nutrient molecules in living cells to release energy.

Excretion

The removal of waste products from an organism's body.

Signup and view all the flashcards

Reproduction

The ability of living organisms to produce more of the same kind of organism.

Signup and view all the flashcards

Species

A group of organisms that can interbreed to produce fertile offspring.

Signup and view all the flashcards

Classification System

A system for classifying organisms into groups based on shared characteristics.

Signup and view all the flashcards

Binomial System

A two-part scientific name for an organism, consisting of the genus and species.

Signup and view all the flashcards

Classification

The scientific system used to group organisms based on shared characteristics.

Signup and view all the flashcards

Taxonomic Hierarchy

A hierarchical system of classification that arranges organisms into increasingly specific groups. Moving down the hierarchy, groups become more closely related.

Signup and view all the flashcards

Dichotomous Key

A tool used to identify organisms based on a series of paired questions about their features. Each question leads to another pair, narrowing down the possibilities until the organism is identified.

Signup and view all the flashcards

Morphology

The study of the form and structure of organisms, often used in traditional classification.

Signup and view all the flashcards

Anatomy

The study of the internal structure of organisms, often involving dissection.

Signup and view all the flashcards

DNA Sequencing

The use of DNA sequences to determine evolutionary relationships between organisms.

Signup and view all the flashcards

Five Kingdoms

The five major groups of living organisms: Monera (bacteria), Protista (single-celled eukaryotes), Fungi, Plantae (plants), and Animalia (animals).

Signup and view all the flashcards

Animals

Multicellular organisms with cells containing a nucleus but lacking cell walls and chloroplasts. They obtain nutrition by consuming organic substances produced by other living things.

Signup and view all the flashcards

Plants

Multicellular organisms with cells containing a nucleus, chloroplasts, and cellulose cell walls. They produce their own food through photosynthesis.

Signup and view all the flashcards

Fungi

Organisms, often multicellular, that have cells with nuclei and cell walls not made of cellulose. They obtain nutrients by decomposing organic matter or feeding on living organisms.

Signup and view all the flashcards

Protoctists

Diverse group of organisms, mostly unicellular, with cells containing a nucleus. Some have cell walls and chloroplasts, allowing them to photosynthesize, while others obtain nutrition by consuming organic substances.

Signup and view all the flashcards

Prokaryotes

Unicellular organisms lacking a nucleus and mitochondria. They have cell walls but not made of cellulose.

Signup and view all the flashcards

Vertebrates

Animals with a backbone, also known as the vertebral column.

Signup and view all the flashcards

Invertebrates

Animals without a backbone.

Signup and view all the flashcards

Ferns

Organisms with leaves called fronds that reproduce by spores. They do not produce flowers.

Signup and view all the flashcards

Study Notes

1.1 Characteristics of Living Organisms

  • Movement: An action by an organism or part changing its position.
  • Respiration: Chemical reactions breaking down nutrients for energy.
  • Sensitivity: Ability to detect and respond to internal/external stimuli.
  • Growth and Development: Permanent increase in size due to cell number/size.
  • Reproduction: Processes generating more of the organism's kind.
  • Excretion: Removal of harmful materials, metabolic waste, and excess substances.
  • Nutrition: Intake of materials for energy, growth, and development.
    • Plants: Light, carbon dioxide, water, ions
    • Animals: Organic compounds, ions, water

1.2 Concept & Uses of Classification Systems

  • Species: Group of organisms that can produce fertile offspring.
  • Classification: Grouping organisms into categories based on shared features.
  • Binomial System: Two-part naming system (genus and species) using Latin.
    • Example: Homo sapiens (human)
      • Genus (capitalized) follows by species (lowercase)
  • Dichotomous Keys: Series of questions used to identify organisms.
    • Follow the statements/questions systematically to identify organisms.

Additional Topics (from further pages)

  • Five Kingdoms: Initial classification scheme for living things:
    • Animals
    • Plants
    • Fungi
    • Protoctists
    • Prokaryotes
  • Vertebrates: Animals with a backbone.
    • Five classes: Mammals, Birds, Reptiles, Amphibians, Fish
  • Invertebrates: Animals without a backbone.
    • Categorized by morphology, notably presence/structure of jointed legs (e.g., arthropods)
  • Plants (including flowering plants, ferns): Reproduction, characteristics used to distinguish between groups (e.g., monocots, dicots).
  • Viruses: Not considered living, use host cells to reproduce.
    • Consist of genetic material (DNA or RNA) within a protein coat.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Biology - Characteristics, Classification, & Features of Organisms PDF

Description

Explore the fundamental characteristics of living organisms, including movement, respiration, and reproduction. Additionally, learn about classification systems such as the binomial naming system and the concept of species. Test your knowledge and understanding of these essential biological concepts.

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser