The reasons for the population explosion of larvae of European zebra mussels at Lake Erie and Lake Ontario of USA. Concept introduction: Invasive species are a threat to the communities and ecosystems of the native areas. These species are those that are introduced from other areas. They out-compete the native species for the food resources and multiply in large populations, thus invading the new area. Invasive species are a threat because they push the native species to the brink of extinction and disrupt the food web of that area.

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Chapter 37, Problem 15TYK

Summary Introduction

To explain: The reasons for the population explosion of larvae of European zebra mussels at Lake Erie and Lake Ontario of USA.

Concept introduction: Invasive species are a threat to the communities and ecosystems of the native areas. These species are those that are introduced from other areas. They out-compete the native species for the food resources and multiply in large populations, thus invading the new area. Invasive species are a threat because they push the native species to the brink of extinction and disrupt the food web of that area.

Summary Introduction

To explain: The effects of invasive European zebra mussels on the native organisms that have to share their ecosystem with them.

Concept introduction: Invasive species are a threat to the communities and ecosystems of the native areas. These species are those that are introduced from other areas. They out-compete the native species for the food resources and multiply in large populations, thus invading the new area. Invasive species are a threat because they push the native species to the brink of extinction and disrupt the food web of that area.

Summary Introduction

To suggest: The ways to curb the mussel population problem.

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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.) Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…