- classification - classification is the grouping of things according to their similar...
TRANSCRIPT
- - ClassificationClassification is the grouping of things according to their similar characteristics
- People classify things to give order to the world and help them to survive, to help understand things better
- - TaxonomyTaxonomy is the branch of biology that deals with classifying things
- - Binomial NomenclatureBinomial Nomenclature is a naming system that gives each organism two names - a genus namegenus name and species namespecies name
Examples of scientific namesOrganism Genus species
Wolf Canus lupus
Honey Bee Apis mellifera
Humans Homo sapiens
Living things are classified into 7 major groups
Kingdom Largest groupingsPhylumClassOrder Family GenusSpecies Smallest groupings
**King Phillip Came Over For Good Soup
- Kingdoms are the largest and most general groups in classification
- Species is the smallest and most specific group
There are 5 Kingdoms1. Monerans (monera) – also called
BACTERIA2. Protists (protista)3. Fungi4. Plants5. Animals
Moneran Kingdom
- Monerans are tiny, single celled, do not have a nucleus and can be called bacteria
- Two types of monerans include bacteria and blue-green algae
- Bacteria come in 3 shapes; rod shaped, round and spiral
- Monerans have a cell wallcell wall; a tough, rigid outer covering that supports and protects. A cell cell membranemembrane; controls what enters and leaves the cell. Hereditary materialHereditary material; in cytoplasm - not in a nucleus like other cells
- Bacteria cannot move on their own. They are carried by air, water, clothing , or other objects. Some may also have a flagellum flagellum (tail)
================================= They can be harmfulharmful
- Can spoil food
- Poison water supplies - caused by pollution
- Damage property - breakdown leather, asphalt
- Cause disease - strep, pneumonia, tetanus, Lyme disease, Bubonic plague
- Bacteria can also be helpful- They decompose dead organisms and return
simpler substances to the environment to be used by other organisms
- They produce oxygen; change environments- Help produce foods- cheese, yogurt, pickles- Breakdown garbage into methane gas -
petroleum- Clean up the environment - decompose
garbage, breakdown oil and plastic- Make vitamins and help animals digest- Produce antibiotics that kill other bacteria- Used in industry
The Protist Kingdom- Protists are similarsimilar to monerans because
the are unicellular; one of the first organisms on earth; microscopic
- They are differentdifferent than monerans because protists have a nucleus and other cell structures
Where and how do protists live?
Where?Where?- Most live in a watery environment-
salty and fresh- Some live in moist soil- Some live in larger organisms and are
called parasites - organisms that live on or in a host cell and harm it
How?How?- They live in individual cells- Some live in colonies (groups of cells)
Animal-like Protists - Protozoa
- They contain a nucleus and have no cell wall
- They are heterotrophs (cannot make their own food)
- They can move
4 Types of Protists1. 1. SarcodineSarcodine- Animal-like protist that move by extensions of
the cell membrane and cytoplasm called pseudopods EX: ameba
2. 2. CiliateCiliate- Protist that moves by hairlike extensions called
ciliacilia that are on the outside of cells EX: paramecium
3. 3. FlagellateFlagellate- Protist that moves by flagellumflagellum - a long
whiplike structure that propels a cell through its environment
4. 4. SporozoanSporozoan- parasites that feed on the cells and body fluids
of their host animals EX: malaria
Plant-Like Protists - Algae
- They are unicellular- They are autotrophs - use
light energy to make their own food
- They are a vital part of the world because many other organisms rely on them for food
3 Types of Algae1. 1. EuglenaEuglena- plantlike protist that contain chloroplasts,
flagella and a reddish eyespot
2. Diatoms2. Diatoms- most numerous protist made of glassy
material
3. Dinoflagellates3. Dinoflagellates- plant like protist that have cell walls that
look like plates of armour and also have 2 flagella to propel them through water
Fungus Like Protists- They are protists that are heterotrophs,
have cell walls and at different stages of their life, have characteristics similar to protists like flagella and looking like amebas
- A slime mold is a fungus-like protist that is moist, flat, shapeless blob that live in dead trees, fallen leaves and compost heaps
Fungus KingdomHow do fungi feed?- Fungi feed by growing on their food. - They release chemicals that digest the food
that they are growing on. - They then absorb the digested food.What are hyphaehyphae?- Hyphae (hi-fee) are threadlike tubes that
make up multi-cellular fungi.- They branch out and weave together to
produce many shapes of fungi.- They can grow quickly.
Fungus Kingdom
How do most fungi reproduce?- Fungi reproduce by spores (a form of
asexual reproduction).- Spores are tiny reproductive cells that are
enclosed in a protective case.- They are carried by wind and if they land in
a place that is ideal they are able to sprout.- Fungi produce spores in fruiting bodies.EX: a puff ball can produce trillions of
spores
FUNGI Hypahe and spores Fruiting body (Puffball)
3 Forms of Fungi:1. 1. MushroomsMushrooms - Fungi shaped like umbrellas with a stem-like
structure called a stalkstalk and a capcap on top- Spores are produced on the underside of the
cap3 Parts of a mushroom are…1. StalkStalk -- stem-like structure2. CapCap - - on top of the stalk. Spores are
produced here3. GillsGills - - thin sheets of tissue that go from
stalk to cap. The spores are stored here
2. 2. YeastYeast- Single celled fungi used in bread
making- Reproduce by budding
3. 3. MoldsMolds- Fuzzy, shapeless, fairly flat fungi that
grow on the surface of an objectEX: Penicillin
Diseases caused by fungi
Dutch Elm DiseaseDutch Elm Disease and Chestnut Chestnut BlightBlight both kill trees
Toxin producing fungusToxin producing fungus- produces cancer-causing substances that could injure or kill humans
Ergot Ergot -- spiky poisonous growths on rye grain. It causes burning, prickling sensations, hallucinations and convulsions
Athlete’s FootAthlete’s Foot and RingwormRingworm both cause itchy, raw, red patches on the skin
What is a Lichen?
- A lichen is a fungus and an alga that live together.
- When they are together they can live in places that neither could survive in alone
What do the fungus and alga do for each other?- The fungus part provides the alga
with water and minerals that the fungus absorbs from whatever it is growing on
- The alga part uses the minerals and water to make food for the fungus and itself
Plant Kingdom- Multicellular algae lack transport tubes
that other plants have. They do not contain roots, stems or leaves or produce seeds. They do contain pigments (colored chemicals) and live in or near a source of water
- The 3 Phyla of algae are red, brown and green
Needs of Land Plants:1. Need to support the leaves and other parts
of the body so that they do not collapse2. Need to obtain water and minerals3. Need to transport food , water, minerals,
and other materials from one part of the body to another
4. Need to get sperm cells and egg cells together so that reproduction can occur
Mosses, Liverworts and Hornworts- These are tiny plants that live in moist
placesThey do not have a lot of adaptations
because:1. They are small and live in places where
water is plentiful2. They do not need stems to support them3. They do not need a special transport system4. They do not need an adaptation to prevent water loss because they live in watery places
What is a fern?- A vascular plant. They have tiny tubes that
transport water, food, and materials throughout its body. They also have leaves with a waxy covering to prevent water loss
- Ferns adapt by having thick, strong cell walls for strong stems (they can grow taller) They also have roots that anchor them to the ground and absorb water and minerals for the plant
- Ferns reproduce by having their sperm cells swim to the egg cells in standing water
Seed Plant Structure- - XylemXylem is a vascular tissue that carries
water and minerals from the roots to the rest of the plant
- - PhloemPhloem carries food throughout the plant
- - RootsRoots anchor the plant to the ground and absorb water and minerals from the soil
- - StemsStems provide the means by which water, minerals and food are transported between the roots and leaves of the plant. The stem also holds the plant up to get sunlight
- - LeavesLeaves make food for the plant by photosynthesis (use light to make food)
- The purpose of the flower is to help the plant reproduce. The flower contains sperm and egg cells
- An angiosperm is a plant where ovules and seeds are contained in an ovary
- A gymnosperm is a plant whose ovules and seeds are not surrounded by an ovary
The Animal Kingdom
- An animalanimal is a multi-cellular heterotroph whose cells lack cell walls
- A vertebratevertebrate is an animal that has a backbone or vertebral column
- An invertebratenvertebrate is an animal that does not have a back bone. This constitutes 95% of all animal species
Phylum Proifera
- A spongesponge is the smallest group of invertebrates. They grow attached to one spot and contain many pores.
How do they feed?- Water carries food and oxygen as it moves
though the pores of the sponge. The sponge’s cells remove food and oxygen from the water and release waste products in the water
- A spiculespicule is a tiny spiny structures that form the skeleton of many sponges. It is made of a glassy material
Phylum Cnidaria- Organisms include hydra, jellyfish, corals, sea
anemones- A polyppolyp is a type of cnidaria that stays in one
place. (shaped like a vase)- A medusamedusa is a cnidaria that can move from
place to place (shaped like a bowl)Basic Characteristics1. Hollow body cavity with only one opening
calledthe mouth
2. They have nematocystsnematocysts or stinging cells to stun or kill prey
3. They have special tissues4. They reproduce sexually or asexually
hydra
jellyfish
coral
sea anemone
Phylum Platyhelminthes
- - FlatwormsFlatworms are flat bodied worms. They can regenerate lost body parts and some are parasite
EX: Planaria
- A tapeworm is another example
Phylum Nematoda- A roundwormroundworm can live on land or in water- Some are parasites and live in animals- These worms have tube-like digestive systems
(mouth and anus)Ex: Trichinella and hookworms
Phylum Annelida Segmented wormsSegmented worms are worms with
segmented bodies They live in oceans, lakes, streams and
soil They have specialized cells, a
circulatory system and a nervous system
EX: Earthworm, sandworm
Phylum Mollusca A molluskmollusk Is a soft bodied animal that
have inner or outer shellsCharacteristics1. Foot - thick muscle used to open and
close their shell or for movement
2. Head - contains mouth and sense organs (eyes)
3. Mantle- produces material that makes up the hard shell
- GastropodsGastropods are mollusks that have a single shell or no shell at all. They live in fresh or salt water and on land
EX: Snail, slug, sea butterflies
- A bivalvebivalve is a two-shell mollusk. The two shells are held together by a powerful muscle. They are filter feeders - filter food out of their body.
EX: clams, oysters, scallops, mussels
- A cephalopodcephalopod is a mollusk with tentacles. They do not have an outer shell but have one within some part of their body. They are very quick; some produce ink when they are frightened
Ex: octopuses, squids, nautiluses
Phylum ArthropodaCharacteristics1. Live in air, on land, or in water2. Exoskeleton - skeleton on the
outside of the body3. Segmented body4. Jointed appendages CrustaceansCrustaceans are an arthropod with a
hard exoskeleton, 2 pairs of antennae and mouth parts for crushing food. Most live in water some live on land
EX: Crabs ,lobster, shrimp, barnacles
CentipedesCentipedes are arthropods with many legs. They have one pair of legs in each segment
A millipedemillipede is an arthropod with many legs. They have two pairs of legs in each segment
An arachnidarachnid has 2 body parts - a head/chest and an abdomen part. They have 8 legs (4 pairs)
Ex: spider, scorpion, tick, mites The insectsinsects are the most numerous
arthropods. Their bodies are divided into 3 parts- a head, a chest, and an abdomen. They have 6 legs attached to the chest
Ex: grasshoppers, ants, flies
Phylum EchinodermataCharacteristics
1. They have spiny skin
2. They have an internal skeleton and 5 body parts
3. A water vascular system
4. Tube feet
EX: Starfish, sea lilies, sea urchins, sand dollar
Phylum Chordata A vertebratevertebrate is an animal with a
backbone. A vertebral column is used to protect the spinal cord which runs through the center of the backbone
An endothermendotherm is a warm-blooded animal. They are able to maintain their body temperatures internally (endo=inside)
An ectothermectotherm is a cold-blooded animal. They rely on the environment for heat
Cold Blooded Animals Fish are water dwelling vertebrates
that are characterized by scales, fins and throats with slits. ***Although some do not have all of these characteristics****
A jaw-less fishjaw-less fish is a fish with no jaw or scales - they are the most primitive fish. They do have paired fins and an entire skeleton made of cartilage. EX: lamprey, hagfishes
= hagfish
A cartilaginous fishcartilaginous fish has a skeleton make entirely of cartilage. Most have tooth-like scales covering the body. Body shape most represents a torpedo.
EX: Shark, skates, rays
A bony fishbony fish has a skeleton made of bones. These fish have a swim bladder- gas filled sac that helps the fish to float (buoyancy). EX: eels, remora, tuna, flounder
What is an amphibian? Vertebrates that are fishlike and breath
through gills when immature They live on land, breathe through
lungs and have moist skin when adults No scales or claws Most live in the water for the first part
of their life and then on land for the second part of their life
EX: Frogs, newts, toads, salamanders
What are reptiles?
Vertebrates with lungs, scaly skin, and special egg types
Their scaly skin is very hard, waterproof and prevents the reptile from drying out
EX: lizards, snakes, turtles, alligators, crocodiles
Warm-Blooded Animals Birds are warm-blooded, egg laying
vertebrates that have feathers. The feathers are made of dead cells.
They are used to insulate, fly and attract mates
Ex: birds of prey, perching birds, waterfowl, flightless birds
What are Mammals? MammalsMammals are warm blooded vertebrates
that have hair or fur and that feed their young with milk produced in mammary glands
Egg laying MammalsEgg laying Mammals are mammals that lay eggs. This is primitive. Also called monotrenes EX: duckbilled platypus, spiny anteaters
Pouched mammalsPouched mammals give birth to young that are not well developed. The young spend time in a pouch in the mother’s body. They are called marsupials Ex: Kangaroo, opossums
Placental Mammals’Placental Mammals’ young develop more fully within the female. EX: elephant, giraffe, hippopotamus, gorilla
What is a Virus?A virus is a tiny particle that can invade living cells. They contain hereditary material
Is a virus a living cell? NO!!! They do not carry out all the life functions and cannot reproduce on their own
What can’t a virus do?Perform life processes or reproduce on their own
What can a virus do?Can reproduce inside cells and cause disease
Parts of a virus
- The hereditary material takes control of the cells activities
- The protein coat protects the virus
Viral Replication
- Bacteriophage attaches to host cell and inject its hereditary material into the cell
- The virus’ hereditary material takes control over the cell causing it to make bacteriophage parts
- Bacteriophage parts assemble (come together) into complete virus’
- Host cell bursts and releases newly produced virus
Virus Life Cycle Summary- First a virus gets its hereditary
material into the host cell. Then the host cell makes more virus particles. Finally the virus particles leave the original host cell and it infects new hosts
- The host cell is KILLED