How do organisms reproduce? Know Want to know Learned

Four Corners  Using the Four Corners, go to Strongly Disagree, Disagree, Agree and Strongly Disagree.  Go to the corner that represents your opinion.

Move to the corner that represents your opinion:  Organisms ONLY reproduce sexually.  Organisms NEED a partner to reproduce.  Some organisms do NOT reproduce sexually.

Make your predictions  For each picture:  HOW DO YOU THINK THESE ORGANISMS REPRODUCE?

Picture 1 Hydra

Picture 2 Brassica Rapa

Picture 3 Hammer Head Shark/ Bonnet Head Shark

Picture 4 Yeast Cells

Picture 5 Komodo Dragon

Picture 6 Spider Plant

How do the organism’s reproduce?  All of them are ASEXUAL reproducing organisms!  Komodo dragon, Brassica Rapa, and Hammer head shark reproduce sexually too!

Sexual vs. Asexual Reproduction Create a T-chart

Sexual Organisms  Sexual Reproduction: production of an offspring that results when the genetic materials from two different parents are combined.  Genes from parents passed on through combination of sperm and egg to form offspring leading to genetic variation.  Examples: Humans, mammals, flowers, dogs, birds, whales, bees, fish

Advantages of Sexual Reproduction  Each offspring receives genetic material from two parents leading to genetic variation for offspring.  Genetic variation helps with environmental stress.

Disadvantages of Sexual Reproduction  Having to get an egg and sperm together for fertilization.  Takes time for organisms to grow and develop until they reproduce.

Asexual Organisms  Asexual organisms: production of offspring by one parent without sperm and an egg joining OR without a mate AKA cloning.  Reproduce through fission, budding, and through runners for plants.  Offspring are genetically identical to parent.  Examples: Hydra, spider plant, flowers, bees, sea star, yeast cells, strawberry

Advantages of Asexual Reproduction  Does NOT require a mate.  Takes less time to reproduce offspring since parent and offspring are genetically identical.  Can adapt to same environment.

Disadvantages of Asexual Reproduction  Lack of genetic variation.  Few will survive environmental stress..  Harmful mutations can occur and passed on asexually.

In groups:  Using poster size Venn Diagram.  Decide which organisms have ONLY Asexual OR Sexual Reproduction.  If you feel its both, put in the center of the venn.

Create an Advertisment  You are trying to sell a plant that has either Asexual of Sexual Reproductive characteristics  You will need to decide if you want your plant to be ASEXUAL or SEXUAL.  You must include:  Picture of your plant  Name of your plant  Characteristics that help determine whether it is asexual or sexual.

Reflection Questions  What is the difference between asexual and sexual organisms?  What is an example of asexual organism?  What is an example of sexual organism?

Reflection 1.What advantages are there to sexual reproduction? 2.What advantages are there to asexual reproduction? 3.What would you say is the most important difference between the two types of reproduction?