1. Trace the path of a drop of blood as it travels through your circulatory system to the lungs to pick up oxygen and to

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1. Trace the path of a drop of blood as it travels through yourcirculatory system to the lungs to pick upoxygen and to your cells. Start at the vena cava, discuss whathappens to the blood at the lungs and as itpasses by the cells of your body. What role does diffusion play inthis process and what substances arebeing diffused? You name the organs of the circulatory system inorder as the blood would flowthrough them.
2. Explain the life cycle of a sexually reproducing plant.Include in your explanation, how a plant ispollinated and what happens after fertilization. Includegermination and the requirements for this tohappen. Include a diagram.
3. Compare the circulatory system of the representativeorganisms from phylum Annelida and phylumArthropod. Describe similarities and differences. Which organism ismore complex? Explain yourreasoning.
4. Humans and insects are often said to be the dominantanimals on Earth, and yet there is only onespecies of humans but over seven hundred thousand species ofinsects. How would you explain this?
5. Describe the type of investigation that scientists coulduse to gather evidence about what nutrientsplants need in order to grow.
6. Explain what diversity is. What are the three types ofdiversity? Describe a scenario in whichdiversity is being affected by humans (negatively or positively).What role do humans play inimpacting this diversity? Explain how they are negatively orpositively impacting diversity and whattype of diversity they are impacting.