In order for a species to continue on, avoiding extinction, it must reproduce itself. There are two form of reproduction in nature the asexual form which requires only one parent and the sexual form that includes two parents. Asexual reproduction occurs when only one parent is involved in making a new creature. Since there is only one parent, all the traits of the mom or dad are passed on to the baby. As a result, the parent and child are identically. The most common forms of asexual means of duplication are binary fission, budding, and use of spores. Binary fission is when an organism just splits into two, this is common among bacteria. When the organism doesn’t just split into two near equal pieces and only a small piece of the organism falls off and becomes an organism, we call this budding. Yeast are commonly known to undergo budding. Mushrooms are known to create spores that fall off of it and travel many miles to create a new organism. Sexual reproduction requires two parents that each contribute their genetic information to the offspring. Each parent shares a gamete (sex cell) which contains half of their genetic information of their body cells. When the two fuse (fertilization) they form a zygote, which has half of each of the parent’s genetic information. Since each parent shares their DNA, they share half of their genes with their offspring.
The worksheets look at common forms of asexual reproduction and help you learn to name them and determine which organisms perform each. We then look at the develop of a bird in the zygote stage of development. We move on to come vocabulary terms you will find in plant reproduction and learn to label the parts of a flower. These worksheets look at bird eggs, how amoeba, plants, and star fish reproduce.