ThinkRankReproduction in Animals
Reproduction produces new individuals and continues a species. Animals may reproduce sexually through the fusion of male and female gametes or asexually through methods involving one parent. Human reproduction involves specialised organs, fertilisation, development, and responsible health knowledge.
Learning Objectives
- •Explain sexual reproduction
- •Explain development differs
- •Explain asexual reproduction
Key Concepts
Sexual reproduction
Fusion of male and female gametes produces a zygote with genetic contributions from two parents.
Development differs
Embryo development, birth, hatching, and metamorphosis vary among animals and reflect different life cycles.
Asexual reproduction
Budding, binary fission, and related methods can produce offspring from one parent in some organisms.
Terminology
Historical Insight
Frog life cycle
A frog changes from an aquatic tadpole to an adult, showing metamorphosis and different environmental needs.
Hydra
Hydra can reproduce by budding, in which a small outgrowth develops into a new individual.
Quick Check
What is fertilisation?
How is asexual reproduction different?
Why is metamorphosis useful in some life cycles?
How to use this lesson
Read the overview first, then explain the main idea in your own words before checking the key concepts. Use the quick-check questions without looking at the answer. For examination preparation, verify dates, definitions, and syllabus requirements against your official textbook and school or examination-board guidance.