- Question 20 (0.75 points) √ Saved The fact that a nerve or muscle fibre responds completely or not is all is known as: the threshold level hyperpolarization negative feedback the all-or-none response an action potential
- Question 19 (0.75 points) Saved A patient is found to have high levels of glucose in their urine. Which part of the nephron is likely not functioning correctly? Bowman's capsule Proximal tubule Loop of Henle Distal tubule Collecting duct
- studies fossils. A zoologist B Paleontologist C Meteorologist D Biologist
- Question 17 (0.75 points) At rest, this transmembrane protein plays a critical role in maintaining the proper balance of electrolytes on opposite sides of a neural membrane: cytochrome c oxidase voltage gated calcium channel sodium potassium (Na+/K+) /K+) pump ATP synthase
- 1. Explain what is meant by the term biological diversity. 2. In one or two sentences explain why so many different types of organisms exist on Earth today. 3. Describe how scientists classify an organism. Connect Your Understanding 4 Explain how the classification system helps us to understand how living things are different from or related to each other. 5. Summarize, in your own words, ecosystem diversity, community diversity, and genetic diversity. 6. Compare and contrast the meanings of population and community. 7. Why is there more biological diversity closer to the equator than in Canada? Give reasons for your answer. Extend Your Understanding 8. Imagine that you have to classify all the birds on Earth based on where they live. Design a system that starts with very broad categories of many members and goes to very specific groupings of one type of member. 9. Explain why preseving biological diversity is important to life on Earth.
