Describe the process of crossing over during meiosis and explain its importance. Beginning with fertilization, describe the main stages of animal development. Give a brief, simplified description of each stage.

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1. Describe the process of crossing over during meiosis and explain its importance. 2. Beginning with fertilization, describe the main stages of animal development. Give a brief, simplified description of each stage. 3. Describe the process of natural selection in detail. 1. Briefly describe the three domain system of classification. 2. Explain the functions of blood. 3. what are the functions of the three specialized tissues in plants? In which of these tissues does photosynthesis occur? 4. How did Gregor Mendel control breeding in the pea plants he used for his experiments? 5. Briefly describe the three kinds of natural selection: directional, stabilizing, and disruptive. 6. Explain the difference between ionic and covalent bonds. 7. In your own words, define cell. What are the two main tenets of cell theory? 8. what s the difference between protostomes and deuterostomes? Among living organisms, name at least one phylum example of each of these. 9. Briefly explain the functions of sensory neurons, interneurons, and motor neurons in the nervous syster. 10. In the context of the science of ecology and the concept of niche specialization, briefly explain the competitive exclusion principle and resource portioning.

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