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Questions and Answers
What are the two categories of organisms in the animal kingdom?
Vertebrates and Invertebrates
What is the primary reason for the alarming decrease in biodiversity?
There are several reasons, including pollution, climate change, international trade, habitat destruction, and intensive agriculture
What is the definition of a species?
A group of organisms that consist of similar individuals that can exchange genes and interbreed
What is the common characteristic that defines all living things?
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What is the estimated number of species that go extinct every day?
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What is the main function of phytoplankton in the ocean's ecosystem?
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What is the primary characteristic of fungi that makes them useful as decomposers?
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What is the term for the over enrichment of nutrients in a body of water, leading to the overgrowth and decay of plants and the death of aquatic organisms?
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How do bacteria typically reproduce?
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What is the main difference between zooplankton and phytoplankton?
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Study Notes
Characteristics of Living Things
- Seven characteristics of living things: Reproduction, Movement, Sensitivity, Feeding, Growth, Respiration, and Excretion
- These characteristics are present in all living things
Cells
- Cells are the basic units of all living things
- If an organism is made up of cells, it was once alive
- If an organism was never made up of cells, it was never alive
Biodiversity
- Biodiversity refers to the huge variety of living things in the world
- Biodiversity is decreasing at an alarming rate
- Over half the planet's animal species have already gone extinct
- 200 different species of animals go extinct every day due to:
- Pollution
- Climate Change
- International trade
- Habitat Destruction
- Intensive Agriculture
Species and Kingdoms
- A species is a group of organisms that can exchange genes and interbreed
- The five kingdoms of living things: Animal Kingdom, Plant Kingdom, Fungi Kingdom, Monera Kingdom (Bacteria and Blue-Green algae), and Protist Kingdom (Algae, Microscopic organisms)
- The Animal Kingdom is divided into vertebrates (have a spine/backbone) and invertebrates (don't have a backbone)
Animal Kingdom
- Examples of vertebrates: Fish, Birds, Reptiles, Mammals, and Amphibians
- Examples of invertebrates: Insects, Crabs, Spiders, Snails, and Earthworms
Parasites
- A parasite is an organism that lives in or on another organism and depends on it for life
- Examples of parasites: Flea, Tick, and Head Lice
Plant Kingdom
- Plants are producers that make their own food through photosynthesis
Fungi Kingdom
- Fungi are made up of masses of long thread-like cells
- They reproduce by producing tiny spores in special structures
- Fungi can cause food to rot, but they also act as decomposers, helping nutrients return to the environment
Protist Kingdom
- Many protists are one-celled organisms that live in water and obtain nutrients from it
- Examples of protists: Algae and seaweed
Bacteria Kingdom
- The Bacteria Kingdom is the largest kingdom in terms of number of species
- Bacteria reproduce by splitting into two
Plankton
- Plankton are microscopic plants and animals that drift along with water currents
- There are two types of plankton: Phytoplankton (plants and bacteria) and Zooplankton (animals that eat phytoplankton or other zooplankton)
Eutrophication
- Eutrophication is the over-enrichment of nutrients in water, causing overgrowth and decay of plants and deoxygenation of water
- This can lead to the death of aquatic organisms
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Description
Test your knowledge on the seven characteristics of living things, including reproduction, movement, sensitivity, feeding, growth, respiration, and excretion. Learn about the importance of cells as the basic units of all living things and explore the concept of biodiversity.
