Notes on Reproduction
Download
Report
Transcript 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
7004.jpg
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