BIOLOGY VERIFIED NOTES-REPRODUCTION

BIOLOGY VERIFIED NOTES-REPRODUCTION

Zygote

The fertilised egg when the diploid number is restored.

Embryo

The developing diploid organism that grows after fertilisation - this term is appropriate before
organogenesis (organ formation).

Foetus

The term for the developing organism after the first eight/nine weeks. The developing baby has
started to develop organs.

Differentiation

When cells become specialised to carry out particular functions.

Cuttings

Artificial asexual reproduction in plants when a piece of plant stem is taken and planted into
compost.

Sepal

The protective outer layer of the flower that protects the bud.

Petals

The large, colourful patterns found on ________ that attract insects. Commonly absent on wind
pollinated flowers.

Filament

The structure that supports the anther.

Anther

The pollen producing structure.

Style

The supportive structure for the stigma. The pollen tube digests its way through this to fertilise
the ovum.

Stigma

The sticky (insect pollinated) or feathery (wind pollinated) landing site for pollen.