Approximately how long do petrified rock fossils take to form? List 4 things that can be learned from a fossil.

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How do preserved fossils differ from rock fossils?

Why is knowing what is a “normal” fossil of an animal important?

When studying, careful documentation of appearance, size, weight, etc. are very important. What purpose does this serve for a paleontologist?

Explain at least two challenges you see to doing good paleontology. What makes this science difficult to do well?

Sammi is studying the interaction of the digestive and circulatory systems in the human body. she has listed various processes that occur in each of the systems. put the processes in order to describe the interaction between these two systems. tiles nutrients diffuse through the villi of the small intestine. digestive processes break nutrients down in the mouth, stomach, and small intestine. blood is pumped through the circulatory system to deliver nutrients to other organs. nutrients are ingested at the mouth. nutrients enter the capillaries of the circulatory system. sequence

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Why does the skin of your finger shrink when you wash clothes for a long time?