Transcript From Bacteria to Fungi

From Bacteria to Fungi
Interactions of Symbiosis (write in notes)
• Commensalism - A close relationship in which one
organism benefits, but the other is not harmed. Ex.
Bird builds a nest in a tree.
• Mutualism - A relationship in which both species
benefit. Ex. Bee and flower
• Parasitism - A relationship in which one species
benefits, and the other is harmed. Ex. Protozoan
spreading malaria through mosquitoes.
Virus
• A virus is a tiny, non-living particle that enters and
then reproduces inside a living cell.
• Viruses can only multiply when they are inside a
living cell.
• The organism is a host, and the virus acts like a
parasite, by destroying the cells in which they
multiply.
Virus Shapes
• Viruses have many
different shapes.
• A bacteriophage is a
virus that infects
bacteria.
Structure of Viruses
• All viruses have two basic parts: a protein
coat to protect it and an inner core made of
genetic material.
• Viruses are very tiny.
Viruses Multiplying
• Once inside a cell, a virus’s genetic material takes
over many of the cells functions.
• It instructs the cell to produce the virus’s proteins
and genetic material.
• These proteins and genetic material then assemble
into new viruses.
Bacteria
• Bacteria are prokaryotes. The genetic material in
their cells is not contained in a nucleus.
• Bacteria must have a source of food and a way of
breaking down the food to release its energy.
• The process of breaking down food to release its
energy is called respiration.
Bacteria Shape
• 3 basic shapesspherical, rod like, or
spiral.
• Can be big to small in
size.
Reproduction
• Asexual Reproduction is a reproductive process
that involves only one
parent and produces
offspring that are
identical to the parent.
• Binary fission - bacteria
uses this method in which
a cell divides to form two
identical cells.
• Mitosis - DNA copies, the
cells start to split and
separate into 2 daughter
cells.
Protists
• Protists are eukaryotes that cannot be classified as
animals, plants, or fungi. They are unicellular.
• Animal-like protists are heterotrophs and are able to
move from place to place to obtain food.
Protozoan
Amoebas use psuedopods, which are temporary
budges that help it gain food and to move. Amoebas
engulf their food.
Paramecium use cilia, hair-like projections from cells to
move.
Protozoan
Flagellates are protists that use long, whip like, flagella
to move. It can be 1 or more flagella. Euglenas use
a flagellum.
Parasites feed on cells and body fluids of their hosts,
causing them harm.
Plantlike Protists
• Euglena and Volvox
• Euglena can be green if they have chloroplasts and
make their own food. Also have a red eyespot.
• Volvox are similar to the Euglena, except they live in
colonies.
Volvox
• A Volvox is a type of green
algae. It is spherical, with a
red eyespot that allows it to
swim towards the light.
Volvox are green, being
made of chloroplast that
allow them to make food
through photosynthesis.
Fungus-like Protists
• A spore is a tiny cell that is able to grow into a new
organism.
• Like fungi, fungus like protists are heterotrophs,
have cell walls and use spores to reproduce.
• Example - molds
Fungi
• Fungi are eukaryotes that have cell walls, are
heterotrophs that feed by absorbing their food, and
use spores to reproduce.
• Fungi usually reproduce by making spores. The
lightweight spores are surrounded by a protective
covering and can be carried easily through air or
water to new sites.
The role of Fungi
• Fungi play important roles as decomposers and
recyclers on Earth. Many fungi provide foods for
people. Some fungi cause disease while others fight
disease. Still other fungi live in symbiosis with other
organisms.
Video Clips
1. Germs Movie for Kids Virus & Bacteria Introduction https://www.youtube.com/watch?v=7D0eIsuZC3w
2. Pathogens Song https://www.youtube.com/watch?v=Hr7jjlZI6NA&featu
re=youtu.be&list=PLqTEqBBPoqwVTbS_6i2lsAmWT
aW9312Fl
3. Viruses: Virus Replication and The Mysterious
Common Cold https://www.youtube.com/watch?v=PHp6iYDi9ko&t=
180s