Sam’s Listhttp://samslist.blogspot.com/2007/11/salmonella-typhi.htmlaccessed 11.03.08

Reproduction

Reproduction in Plants

Types of Reproduction

Germination of Seeds

Types of Reproduction

A. Asexual Reproduction

B. Sexual Reproduction

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A. Asexual Reproduction

1. Asexual reproduction is the generation of offspring from one parent

a. produces offspring that are identical to the parent

b. may produce a colony of clones

2. Prokaryotic cells divide by binary fission_

Stephen Durrhttp://www.btinternet.com/~stephen.durr/microbes.htmlaccessed 13.02.09

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HOW IS THE REPRODUCTION OF YOUR CELLS DIFFERENT THAN THE REPRODUCTION OF OFFSPRING?

Think about it!

Think

3. Eukaryotic cell division involves division of the nucleus (mitosis)

4. Asexual reproduction may involve budding from the parent

a. plant

b. hydra

c. yeast_

California State University, Long Beachhttp://www.csulb.edu/labs/GharakhanianLab/accessed 13.02.09

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B. Sexual Reproduction

1. Sexual reproduction is the generation of offspring from two parents

a. gametes (sperm and egg) are produced by cell division involving meiosis

b. a mobile male gamete fusing with a stationary female gamete_

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c. produces offspring that are genetically different

d. increases variation in the population_

Eve Astrid Anderssonhttp://www.eveandersson.com/photo-display/large/japan/sapporo-botanical-garden-insects.htmlaccessed 13.02.09

2. Internal fertilisation typically occurs in land animals

a. sperm delivered to the egg inside the female

b. prevents sperm and egg from drying out

3. External fertilisation typically occurs in water animals

a. male deposits sperm on eggs in water_

Wildlife Rangerhttp://www.wildliferanger.co.uk/index.phpaccessed 13.02.09

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Reproduction in Plants

A. The Flower

B. Pollination

Wildlife Rangerhttp://www.wildliferanger.co.uk/index.phpaccessed 13.02.09

A. The Flower

1. Reproductive parts of an insect-pollinated flower

a. sepals- protect the bud

b. petal (with guide lines)- attract insects

c. stamen- male reproductive parts

1) anther- contains pollen (sperm)

2) filament- holds up anther_

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WHAT ARE SOME OF THE STRATEGIES PLANTS USE FOR REPRODUCTION?

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d. carpel- female reproductive part

1) stigma- sticky to collect pollen

2) style- holds up stigma

3) ovary- contains ovules (eggs)_

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2. Insect-pollinated flowers have

a. attractive bright colored petals

b. sweet nectar to draw insects closer to anthers & stigma

c. small amount of pollen_

Stock Photo Botanichttp://www.stockphotobotanic.com/accessed 13.02.09

3. Wind-pollinated flowers have

a. small inconspicuous petals

b. anthers & stigma hang outside flower to catch wind

c. enormous amounts of pollen_

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B. Pollination

1. Pollination is the process of transferring pollen grains

a. carried from anthers to the stigma

b. can be on the same or a different plant

c. distributed by insects or the wind_

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2. Once pollen reaches the stigma, the pollen tube grows through the style to the ovule

a. creates a passage for the male nucleus

b. fusion with the male and female nucleus_

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3. Fertilisation is when the male gamete fuses with the female gamete

a. sperm from pollen with egg in ovule

b. formation of zygote_

Evas venteromhttp://evaal.wordpress.com/tag/embryo/accessed 13.02.09

The End

Germination of Seeds

A. Fruits and Seeds

B. Germination

Illawarra Environmental Education Centrehttp://www.mtkembla-e.schools.nsw.edu.au/gallery/gallery-mangrove.htaccessed 13.02.09

A. Fruits and Seeds

1. Fruits develop from the ovary of the flower after the fertilisation

a. ovary wall may become dry and hard, soft and fleshy, or leathery

b. each ovule develops into a seed containing a plant embryo_

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IF YOU WERE GOING ON A CAMPING TRIP, WHAT WOULD YOU BRING WITH YOU?

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2. Seeds and fruits can be dispersed by

a. animals carry them away to be eaten (drop or pass seeds)

b. wind can carry some fruits (dandelion parachute)_

Wildlife Rangerhttp://www.wildliferanger.co.uk/index.phpaccessed 13.02.09

3. The structure of a bean seed

a. testa- seed coat

b. micropyle- hole in seed coat to provide access water and air

c. cotyledons- seed leaves used as a food source

d. plumule- embryonic shoot (leaves)

e. radicle- embryonic root_

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B. Germination

1. There are several conditions needed for germination of seeds

a. take in water through micropyle

b. water is needed to dissolve enzymes in cotyledon_

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c. enzymes break down stored food (starch) require specific temperatures

d. dissolved food (glucose) diffuses to radicle and plumule

e. developing embryo respires and grows_

Dizzykeyhttp://images.google.com/url?source=imgres&ct=ref&q=https://dizzykey.co.uk/photos/&usg=AFQjCNENoy4cZswB79txCO_PzxifpcEgyAaccessed 13.02.09

The End