What is life like for a typical plant?Edward Tsui, Au Yueng Hon, William Yuen, Ivan Ho

Do plant have babies?NO! Breed next generation by two process

Fertilization and Pollination

IntroductionFlower:• Obtained both male cell and female cell • Located in Stamen and Carpel respectivelyPollination:• Usually take place before fertilization• Process of pollen transfer from an anther to a

stigma• Only works when both of the plant is the same

species

IntroductionFertilization:• Usually take place after pollination• Process of male gamete fuse with

female gamete• The process of producing seed

Pollination - Beginning Sending out pollen

• Involved stamen, male part, of flower

• Anther: – Male part of flower– Create pollen– Pollen grain ready

to be carry away on them

– Reproduce purpose

Anther

FilamentStamen

Pollination - Process Insect- pollinated flowers, e.g. Okra, Celery Pollen spread by insect Good insect helper : Bee, Butterfly, Rousettus

• Pollen is stick on to the insect while they collect nectar

• Nectar grew deep in the flower to allow pollen to be stick

• Carry pollen to another flower

• Pollen enter other flower while bee collect nectar from other flower

Pollination - Process • Wind- pollinated flowers, e.g. Dandelion• Pollen spread by wind• Special feature: Anther usually stick out to

facilitated the process• Kind of wind-

pollinated plant

• Wind bring away the pollen

• Carry pollen away to another plant

• Pollen landed on the plant while the wind blow pass it

Different kind of pollination

Self-pollination: • Pollen grains are

transferred to the stigma of same flower or plant

: Way of Pollen transferred

Cross-pollination: • Pollen grains are

transferred to the stigma of a different plant

Fertilization– ResultPollen enter new flower Involved female part, carpel Stigma:

Sticky Receive pollen

Style: Transport pollen to the ovary Pollen started to grow, carrying

male gameteOvary and ovules:

Fuse with pollen, female gamete

Act similar with human

Stigma

Style

OVARY AND OVULES

Fertilization- ResultAfter fertilization,Plant usually die quickly afterwards

Ovule developed seed of its species

• Ovary developed into fruit

The seed developed will grow again after the plant die and the species of flower was continued.The cycle of pollination and fertilization then repeat.

ConclusionDo plant have babies?No!Reproduce themselves in other way

Pollination and FertilizationFusing the male and female gamete together to create seed for reproduction

Do Plants Breathe?Edward Tsui

Do plants breathe? No. Instead they absorb air.

Do not have a bloodstream or lung

In a passive way instead of an active process

The Process (At Day time) Plants breathe in gas from the air. Most

importantly Carbon Dioxide and Oxygen

Releases excessive Oxygen from Photosynthesis

The Process (At Night time) Plants actually breathe in Oxygen (and

Carbon Dioxide) and breathes out Carbon Dioxide

Oxygen were used breaking down that sugar to get energy for growth and combining other elements, minerals, and chemicals.

How? Absorbs air through the openings on the

underside and upper side of leaves, called Stomata (or air-holes)

Gas moves in to the plant

Why? Plants needs Carbon Dioxide/Oxygen

gas to complete photosynthesis

Photosynthesis is to keep the plant alive

Produces glucose and water