Asexual Reproduction in AnimalsThere’s more than one way to have kids!

Consider the following…

What we are learning…

• Big Goal: I can differentiate between sexual and asexual reproduction.

•Today’s Focus: I can explain three ways that animals reproduce asexually.

Making Predictions

•Read each statement on the guide.

•Check agree or disagree on the before side only!

•Don’t write anything else yet…

Asexual Reproduction•Reproducing without sex•Making new organisms with the same genetic code or DNA as the parent organism

•Basically the children are clones of the parent

Group Investigation Part One – Defining the Types Leader reads the 1-2-3 small

slips of paper. Group writes down in their own

words a definition for each: budding, fragmentation, regeneration

Time: 5 min.

Group Investigation Part Two – Deciding on the Type Leader gives out animal cards to

group members to read to the group. (There are five so leader reads two.)

As each person reads about the animal, decide as a group which type of asexual reproduction that animal does (budding, fragmentation, regeneration).

Time: 10 min.

Organizing Tip

•Lay out the 1-2-3 cards•Lay out the animals that belong under each type.

Group Investigation – Part ThreeUnderlining the EvidenceLeader asks group what evidence shows

the animal card belongs under budding, fragmentation, or regeneration.

Recorder underlines the evidence on each animal card that proves it belongs under that type of asexual reproduction.

Time: 6 min.

What we are learning…

• Big Goal: I can differentiate between sexual and asexual reproduction.

•Today’s Focus: I can explain three ways that animals reproduce asexually.

Let’s Get Some Feedback

•Fill in your graphic organizer example boxes with the animals that belong under each type of asexual reproduction.

•Count how many your group got correct!

Budding- Hydra and YeastA new clone grows on the side of the parent’s body. It may separate from the parent or remain attached.

Fragmentation - Flatworm

Separating into pieces so thateach piece can grow into a clone of the parent

Regeneration – Starfish and SpongesA new

organism grows back from a piece of the parent that was torn off.

What’s the difference?

What happenedin each of these pictures?

What we are learning…

• Big Goal: I can differentiate between sexual and asexual reproduction.

•Today’s Focus: I can explain three ways that animals reproduce asexually.

Return to Your Predictions

•Read each statement on the guide.

•Check agree or disagree on the before side only!

•Now, with your partner, come up with a statement of evidence (from the research we just did) to prove why your agree or disagree is true.

Why is this important?

•What could scientists learn from these organisms that might help us as humans?

Hydras – Never age

•When people get older, more and more of their cells lose the ability to form new cells. This is why older people tend to have less muscle tissue and a weaker heart (made of cardiac muscle). If it were possible to influence these aging processes, humans could feel physically better for much longer. Studying animal tissue such as those of Hydra may help us understand how to prevent this aging.

Starfish and Sponges Regenerate

•Humans who have to have amputated arms or legs might benefit from what we learn about these organisms that can grow back missing parts.

Write About It…

•Write a well-written paragraph explaining how animals can reproduce asexually.

I. Topic Sentence – Animals can reproduce asexually in three different ways.

II. BuddingA. DefinitionB. Example/Explanation

III.FragmentationA. DefinitionB. Example/Explanation

IV.RegenerationA. DefinitionB. Example/Explanation

V. ConclusionA. Re-state topic sentenceB. Tell why this topic is important in the real world

How to Succeed on this Assessment

Peer Feedback•Read your partner’s paragraph.

•Write one thing that can be improved.

•Write one thing that has been done well.

•Be specific!

Sum it Up!

•What did we learn today?