The cell produced by the fusion of an egg and a sperm at fertilisation. The zygote contains DNA from both the male and female parents, providing all the genetic information required for a new individual.
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A Twig...

Any chromosome that is not a sex chromosome.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

A reproductive cell, such as a sperm or egg cell.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...

The joining together of two or more distinct parts to make a unified whole.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....

The fusion of two sex cells to create a new organism.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

Tiny particles produced by male plants that contain the male reproductive cells enclosed in a protective shell.
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br/>

A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images...

The male reproductive organ of a flower.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...

Another word for fertilisation - when two sex cells combine to create a new organism.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

Discover a tiny hummingbird with very unusual tail feathers.



Biology - Animal Kingdom - Learni

ng Points.

There are over 300 spe

cies of hummingbird.

Hummingbirds use specia

lised beaks to feed on...

Male reproductive cells, also referred to as the male gametes.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...

Fish are by far the most diverse of all the vertebrate groups. Discover the shared characteristics that make a fish, a fish. Biology - Animal Kingdom - Learning Points. Fish are aquatic vertebrates. Jellyfish, starfish and other marine...

This brightly-coloured frog lays its eggs on the ground and must climb high into the rainforest canopy to transport its young to a watery nursery. How? Biology - Animal Kingdom - Learning Points. Poison arrow frogs have poisonous skin,...

Seahorses are terrible swimmers. Discover how this has influenced the way they look, what they eat and how they defend themselves. Biology - Animal Kingdom - Learning Points. Seahorses are a type of bony fish with a thin skin instead of...

A look at the nurturing techniques of the male midwife toad, who is charged with looking after the newborn eggs.



Biology - Animal Kingdom - Learni

ng Points.

Iberian midwife toads mate from September

to...

Discover how splash tetras earned their name from the unusual way they lay their eggs.



Biology - Animal Kingdom - Learni

ng Points.

Splash tetras lay t

heir eggs on leaves.

Male splash tetras find...

Discover the extraordinary parenting techniques of the broad-snouted and spectacled caimans. Biology - Animal Kingdom - Learning Points. Whether a caiman is male or female depends upon the temperature of the nest during its early...

Some plants don't need both a male and female to reproduce - they can do it alone. Which plants can do this and how do they manage it? Biology - Plants - Learning Points. Plants use a variety of methods to reproduce. Methods include...

Discover how barrier methods of contraception can not only prevent pregnancy but stop the spread of sexually transmitted infections. Biology - Being Human - Learning Points. Barrier method contraceptives prevent the sperm from reaching...

How do plants reproduce? How is pollen dispersed and how does it develop into a seed? Discover the vital role flowers play in plant reproduction. Biology - Plants - Learning Points. Flowers are the reproductive part of most plants. The...

Discover the parts of plants necessary for reproduction, and the methods by which pollen is carried between flowers. Biology - Plants - Learning Points. Plants reproduce in various ways. Sexual reproduction occurs using male and female...

From draglines to egg sacs, find out about the many ways that spiders use silk. Biology - Animal Kingdom - Learning Points. Rather than spin a web, wolf spiders catch their prey by stalking it on the ground. Wolf spiders use draglines to...

An introduction to two very different types of tortoise – the jousting angulate tortoises of Dassen Island, and the giant tortoises of the Galapagos. Biology - Animal Kingdom - Learning Points. Male angulate tortoises are very...

Find out why this unassuming bird is one of nature's master architects. Biology - Animal Kingdom - Learning Points. Malleefowl are large birds native to Australia. Malleefowl live a solitary existence for most of the year, but they mate...

From orchids that mimic the appearance of bees to the carrion flower which smells like rotting meat, discover the devious world of the plant mimic. Biology - Plants - Learning Points. Some plants use mimicry to aid reproduction or...