1/9/14 pick a partner or work by yourself grab a chart and one set of organisms. from the front...

1/9/14

• Pick a partner or work by yourself• Grab a chart and one set of organisms. from

the front table. ONE PER GROUP• Begin reading about your organisms and fill in

you chart. • You will have until 10 mins after the bell rings

to complete this task.

Reproduction

Asexual and Sexual

All Living Things……

1. Are made of cells,2. Require energy, 3. Grow and develop,4. Respond to their surroundings

(stimulus/response)5. Display organization6. Maintain homeostasis7. Adapt and evolve over time8. REPRODUCE

Thinking Points

• What is the result of reproduction?• Why do organisms bother to reproduce? Why

don't they just live forever? • What would eventually happen to a species if

every member suddenly lost its ability to reproduce?

Reproduction=making babies!

Two Types of Reproduction

1. Asexual reproduction - production of genetically identical offspring from a single parent.

2. Sexual reproduction - production of genetically different offspring from two parents.

Review:What does this word “genetic” mean anyway?

DNA

DNA is an instruction manual for an organism

Asexual Reproduction5 Types You Need to Know

1. Binary Fission2. Vegetative reproduction3. Budding4. Spore formation5. Regeneration

BRAIN POP!

Binary Fission

Prokaryotic cells divide into 2 genetically identical cells

Vegetative Reproduction

Production of a new plant from a portion of another plant, such as a stem or branch. Also called vegetative propagation.

Budding

Budding is the process of a parent organism pinching off to form a new organism genetically identical to the parent.

Spore Formation

Spores are released from parent to produce genetically identical offspring. (Bacteria, plants, algae, and fungi.)

Regeneration

The ability to replace or regrow missing body parts

Is a form of Sexual Reproduction

Disadvantages

• Asexual – no genetic variation (less genetic diversity among the species) so less chance for survival if environment should change

• Sexual – – takes longer to make offspring, – requires two parents, – can’t reproduce as often in a single lifetime

Advantages

• Asexual– Requires only one parent– Organisms can reproduce rapidly– Requires less metabolic energy– No special sex organs necessary– Low genetic variability allows a higher success rate

AS LONG AS THE ENVIRONMENT DOESN’T CHANGE.

Advantages

• Sexual – – Because DNA from two parents is combined, lots

of genetic diversity– Organisms reproduce less frequently– Genetic variation allows better chance for survival

if environmental conditions should change– Genetic variation can lead to resistance to certain

types of disease– Genetic variation enables evolution within a

population

Who does it?

• Asexual – organisms from the archaebacteria, eubacteria, and Protista kingdoms, some fungi, some plants, and some simple animals

• Sexual – most animals and plants, some protists, some fungi, humans, some prokaryotes (conjugation).