Welcome to Science 3/7 On your paper write down your own definition for: Reproduction. Then make a list of all the ways you think organisms can reproduce. Today’s Schedule 1. Observing the Sky 2. How Does New Life Begin? Part 1 3. Asexual Reproduction Activity

How does new life begin? What are all living things made of? 1. all living things are made of cells 2. new life can only come from living organisms Therefore, new life can only come by making new cells.

How do we get new cells? Cells are alive. Therefore, cells have a life cycle Mitosis (cell division)- process by which the nucleus divides to form two identical nuclei Animation: Mitosis

What are the results of mitosis? 1. two cells that are exactly the same have been made. 2. asexual reproduction- new organisms are produced from one parent and are genetically identical (clones)

Welcome to Science 3/7 Turn your H-R Diagram into the tray. Today’s Schedule: 1. Turn in HW 2. Pass Back & Review Test 3. Life Science Lesson 1: Asexual Reproduction

Class Averages 3- 90.7% 4- 85.9% 5- 87.8% 7- 86.7% 9- 85.6%

Top Scores 3- Justin Thomas 28/27 4- Will McVey 29/27 5- John Durgala 30/27 7- Jake Stahl & Stephanie Knaus 29/27 9- Caleb Huthmaker 27/27

Asexual vs. Sexual Reproduction Objective: In this unit, we will be comparing and contrasting the two types of reproduction. Today, we will begin learning about asexual reproduction.

Asexual Reproduction The goal of all reproduction is to create offspring to continue the survival of a species. The goal of asexual reproduction is to make offspring in the fastest, least complicated way as possible.

Types of Asexual Reproduction 1. Binary fission- cell reproduction by division (the cell splits to form 2 new, identical cells) binary fission animation

Types of Asexual Reproduction 2. budding- new organism grows from the body of the parent organism ARKive - Brown hydra video -

Types of Asexual Reproduction 3. regeneration- whole organism develops from a piece of another organism Planaria: A window on regeneration. limb regeneration

Types of Asexual Reproduction 4. parthenogenisis- eggs produced by a female develop without ever being fertilized by a male. (some fish, frogs, lizards, and insects reproduce this way) more videos

Asexual Reproduction in Plants 5. Stems: Above ground or underground stems are the most common example asexual reproduction in plants. 6. Roots: Many plants and trees are send out shoots or suckers directly from the roots.

The Big Picture Asexual reproduction limits the spread of different characteristics through a species and only allows for genetic continuity. This can be good or bad for the organism. It all depends on the environment.