An adaptation is a special feature or behaviour of an animal or plant which helps it to survive in its habitat.

A kind of asexual reproduction: bacteria copy themselves and then split in half.

A characteristic that can be any value within a range e.g. height.

Something that prevents a sperm cell from fertilising an egg cell.

Discontinuous variation

Characteristics that only result in certain values or fall into very distinct categories e.g. blood type.

The female reproductive cell: contains 50% of the DNA needed to make a new organism.

A developing organism in a womb, cells are beginning to specialise.

A characteristic that an organism has because of circumstances in its environment e.g. speaking a certain language in humans.

The female of an organism contains the egg cells for reproduction.

When a male sex cell meets a female sex cell.

A developing organism in the womb, the foetus stage is after the development of the main organs.

The male and female sex cells. In humans the sperm cell is the male gamete.

Gestation is the time it takes for a fertilised egg to develop into a baby.

A characteristic that an organism has because of its DNA. You obtain half of your DNA from your father and half from your mother.

A way of displaying continuous data showing bars that run into each other.

The chemicals that control different functions in the body e.g. development during puberty.

The male of a species contains the male sex cell for reproduction.

The monthly cycle that involves the production of an egg ready for possible fertilisation.

Also known as a ‘period’. If an egg cell is not fertilised, the cell is lost along with the lining of the uterus from the body.

Where egg cells are located in a female.

The release of an egg from an ovary.

The male reproductive organ in humans.

The process of physical changes through which a child’s body matures into an adult body capable of sexual reproduction.

Reproduction that involves the fusing of two gametes: occurs when 50% of DNA comes from male gamete and 50% of DNA comes from female gamete.

The male gamete in humans: contains 50% of the DNA needed to create a new organism.

Male reproductive organ where sperm are made and stored.

Female reproductive organ where a developing embryo is held before birth.

Female reproductive organ which is the muscular tube the opens to the outside of the body.

Variation A difference between an organism. Can include both inherited and environmental variation.

Newly fertilised egg: consists of one cell with enough DNA to form a new organism.

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Human Reproduction

Revision for science

Question	Answer
Adaptation	An adaptation is a special feature or behaviour of an animal or plant which helps it to survive in its habitat.
Binary fission	A kind of asexual reproduction: bacteria copy themselves and then split in half.
Continuous variation	A characteristic that can be any value within a range e.g. height.
Contraception	Something that prevents a sperm cell from fertilising an egg cell.
Discontinuous variation	Characteristics that only result in certain values or fall into very distinct categories e.g. blood type.
Eggs	The female reproductive cell: contains 50% of the DNA needed to make a new organism.
Embryo	A developing organism in a womb, cells are beginning to specialise.
Environmental	A characteristic that an organism has because of circumstances in its environment e.g. speaking a certain language in humans.
Females	The female of an organism contains the egg cells for reproduction.
Fertilisation	When a male sex cell meets a female sex cell.
Foetus	A developing organism in the womb, the foetus stage is after the development of the main organs.
Gametes	The male and female sex cells. In humans the sperm cell is the male gamete.
Gestation	Gestation is the time it takes for a fertilised egg to develop into a baby.
Inherited	A characteristic that an organism has because of its DNA. You obtain half of your DNA from your father and half from your mother.
Histogram	A way of displaying continuous data showing bars that run into each other.
Hormones	The chemicals that control different functions in the body e.g. development during puberty.
Males	The male of a species contains the male sex cell for reproduction.
Menstrual cycle	The monthly cycle that involves the production of an egg ready for possible fertilisation.
Menstruation	Also known as a ‘period’. If an egg cell is not fertilised, the cell is lost along with the lining of the uterus from the body.
Ovaries	Where egg cells are located in a female.
Ovulation	The release of an egg from an ovary.
Penis	The male reproductive organ in humans.
Puberty	The process of physical changes through which a child’s body matures into an adult body capable of sexual reproduction.
Sexual reproduction	Reproduction that involves the fusing of two gametes: occurs when 50% of DNA comes from male gamete and 50% of DNA comes from female gamete.
Sperm	The male gamete in humans: contains 50% of the DNA needed to create a new organism.
Testes	Male reproductive organ where sperm are made and stored.
Uterus	Female reproductive organ where a developing embryo is held before birth.
Vagina	Female reproductive organ which is the muscular tube the opens to the outside of the body.
Variation	Variation A difference between an organism. Can include both inherited and environmental variation.
Zygote	Newly fertilised egg: consists of one cell with enough DNA to form a new organism.

Created by: user-2044875

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