Download Notes on Reproduction

Notes on Reproduction
By: Dhikshitha 7E
Plants can Reproduce in 2 ways.
oAsexual Reproduction.
oSexual Reproduction.
http://www.targetcbse.co.in/LMSM/file.php
/1/polncycl.gif
http://www.saburchill.com/ans02/images2/21080
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Asexual Reproduction
• Asexual reproduction is the formation of new
individuals from the cell(s) of a single parent.
It is common in plants than in animals.
http://www.education.com/sciencefair/article/asexual-reproduction/
Examples of Asexual Reproduction
Budding in Hydra.
Budding in yeast
spore formation in bread mould.
Binary Fission in Bacteria
Vegetative probation in potatoes in strawberries
etc.
Budding in Hydra.
Budding in hydra. As you can see
in the image budding in hydra is
when a small bud grows and
starts to develop.
http://www.labtechindia.net/product/Biology/bl83.jpeg
Here is a youtube video that explains more about budding in hydra.
http://www.youtube.com/watch?v=a5oHMjGqjyo
Binary Fission in Bacteria
Binary Fission in Bacteria is when the parent
enlarges (grows) and duplicates it’s DNA. In
other words I splits into 2.
http://iws.collin.edu/biopage/faculty/mcculloch/1406/outlines/chapter%2011/11-2.JPG
Sexual Reproduction
Plants can be Uni sexual or Bisexual
Female
•Stigma
•Style
•Ovary
•Ovules
http://www.mendelweb.org/MWflower.html
Pollination
Pollination is when pollen
is transferred form one
plant to another and
enables the fertilization
and sexual
reproduction.
http://www.theairquality.com/wpcontent/uploads/2010/05/bee-collecting-
It can happen in many ways:
Bees: When bees take nectar from plants
the pollen sticks on them. And when they sit
on another flower the pollen wares off.
Air: Pollen may move in the direction on the
wind and fall on other flowers.
http://www.treehugger.com/pollenhelps-allergies-phot.jpg
Fertilization
• Fertilization is the fusion of pollen grain
nucleus and ovule nucleus.
http://www.school.net.th/library/create-web/10000/science/10000-6584/pic1.jpeg
Seed Dispersal
Seed Dispersal can happen in 4 different ways.
Air
Water
Animals
Exploding flowers
Seed dispersal through air.
• The lighter seeds can be carried to different
places by air.
http://passionforeducating.com/yaho
o_site_admin/assets/images/Picture1
4.47125647_std.png
http://researchfacility.files.wordpress.c
om/2010/09/alsomitramacrocarpa.jpg
Seed Dispersal Through Water
• If the plant was next to a
body of water, there are
chances that the seed
would fall in the water. It
will move to a far away
place according to the
movement of the water.
http://web1.stmaryssenh.schools.nsw.edu.au/SMSHS/ricks%20sites/Biology%20web%20site/Pre_8_5_Evolution%2
0of%20Australian%20Biota/Seed%20dispersal/Seed%20Dispersal%20prac/bladed-seeds.jpg
Seed Dispersal Through Animals
• When animals like
squirrels find a
fruit thy take it to
different places
and eat it. They do
not eat the seed,
so they spit it out.
http://4.bp.blogspot.com/_PuCt7OSC9iM/Sc6101DoLsI/AAAAAAAAAD8/hPn4YGntD
b8/s400/squirrel.jpg
Seed Dispersal Through Animals
• Some seed have hook
like ends. When
animals run past them
they hook to their fur.
As the animals run the
seeds fall off.
http://media.spokesman.com/photos/2011/02/04/SRX_dogpark_5_t400.jpg?fd5af0684
d698ce74dd4392bafb4f89a6dc66ee3
Seeds Dispersal though exploding
fruits
• Particular fruits explode when they get ripe.
The shoot out their seeds and the seeds fall in
different places.
http://biologylabs.utah.edu/bohs/IMAGES/Stephen%20Stern/S%20turner
oides-ssm.jpg
Seeds
• There are 2 different types of seeds
Dicot Seeds
Monocot Seeds
http://www2.yk.psu.edu/~sg3/ist311/games/team3/images/seeds.png
Dicot Seeds
• Dicot Seeds are seeds that be spit in half. They
are made of two pieces.
http://www2.estrellamountain.edu/faculty/farabee/biobk/dicotseed.gif
Monocot Seeds
• Monocot seeds cannot be split into half. It is
made of 1 piece.
http://3.bp.blogspot.com/_NfIGV0h1wfI/Rw7Fqnr4drI/AAAAAAAAABE/fZtGwtNSZY/s400/cornkernel.gif
Germination
Germination in the name of the process in
which a seed grows into a plant.
Conditions need for germination
Air
Sunlight
Soil
Water
http://scienceinhydroponics.com/wp-content/uploads/imageimport/_uEJxElFqOmc/THML1zEnCLI/AAAAAAAAA5c/UFl3w09uwYI/s1600/germination.jpg