Explain how vestigial structures provide clues about a species' evolutionary past. Illustrate your argument with vestigial structures found in humans or other real species.

Plants release a different gas back into the air. What is the name of that gas

Which of the following is true? A: the main factors determining biome conditions are wind and soil type B: a niche is the role an organism has in an ecosystem C: the number of organisms in an abiotic factor D: biomes generally follow man made

Which product makes up the highest percentage of landfill waste? A: plastic B: glass C: metal D: paper

Muscarine is a poison found in poisonous mushrooms. muscarine binds to acetylcholine receptors and mimics its action. which of the following describes the effect of muscarine?

Explain how pH, temperature, and heavy metals (ie: Na+, Mg++, K++) affect enzyme activity

What part of the cell membrane that recognizes chemical signs

What is a called when organisms that cannot make their own energy-rich molecules?

How did Mendel make the F1 generation for his experiments?

Write a paragraph about an insects habitat.

Because most leaves have two sides, do you think you have to double your calculation to obtain the surface area of one leaf? Why or why not?