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Archaeologists find the pelvis of a primitive human and are able to identify the sex, the relative age, and some physical characteristics of the individual. How is this possible from only the pelvis?
If the initial rate of diffusion is 12µg/s when the concentration difference is 1200 molecules/µm^3, what would the rate of diffusion be if the concentration difference was decreased to 1000 molecules/µm^3? Give your answer in µg/s
The organelle labelled mitochondria is involved in an important cell process.
Identify the process that takes place in this organelle’s inner matrix.
Why is nitrogen so important?
How do living things obtain nitrogen from the atmosphere?
What happens to producers/plants when you remove consumers from an ecosystem? (hint: think about carrying capacity)
How does bacteria help ecosystems?
Why does a human eating lower on the food chain benefit Earth by conserving energy?
How does energy move up the food chain, how does the amount of usable energy change?
What is the original source of energy for all life on Earth?
