Classification of Animals
What does “classification of animals” mean?
Grouping animals by their features or similarities.
Which group does a jellyfish belong to?
Invertebrate.
What is a life cycle?
The stages of an animal’s life from birth to adulthood.
Why do frogs lay many eggs at once?
To increase survival chances since many get eaten.
What does “reproduction” mean?
The process of producing new living things.
Why do mammals usually have fewer babies?
Because they give more care and have higher survival chances.
What are the two main animal groups?
Vertebrates and Invertebrates.
What are five main classes of vertebrates?
Fish, Amphibians, Reptiles, Birds, Mammals
What are the four stages of a butterfly’s life cycle?
Egg → Caterpillar → Pupa → Adult butterfly.
Name one animal with a simple life cycle.
Chicken or human (they grow but don’t change body form).
Animals that lay eggs are called what?
Oviparous.
What’s the purpose of reproduction in animals?
To continue their species.
What does “vertebrate” mean?
An animal with a backbone
Why are mammals different from reptiles?
Mammals have hair, feed milk, and are warm-blooded; reptiles have scales and lay eggs.
What is a tadpole?
The young stage of a frog that lives in water.
What’s the purpose of metamorphosis in nature?
To reduce competition and adapt to new habitats.
Animals that give birth to live young are called what?
Viviparous.
How does the environment affect reproduction?
Temperature, food, and habitat influence breeding success.
What does “invertebrate” mean?
An animal without a backbone.
How does classification help scientists?
It helps organize, study, and understand animal behavior and evolution.
What is metamorphosis?
A major body change in an animal’s life cycle.
How is a frog’s life cycle different from a bird’s?
Frogs undergo metamorphosis; birds hatch and grow without major form change.
What is fertilization?
The joining of male and female cells to form new life.
What is internal and external fertilization?
Internal – inside the body (mammals); External – outside (fish, frogs).
Name two examples of vertebrates and two of invertebrates.
Vertebrates – fish, dog; Invertebrates – worm, spider.
Explain how humans are classified in the animal kingdom.
Humans are vertebrates, mammals, and part of the primate group.
Which animals go through metamorphosis?
Frogs, butterflies, and some insects.
Why do scientists study life cycles?
To understand growth, reproduction, and environmental adaptation.
Give one example each of oviparous and viviparous animals.
Oviparous – hen; Viviparous – cat.
Explain how parental care helps survival in animals.
Parents protect, feed, and teach young, increasing their survival rate.