Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
Answer:
Heterogeneous mixtures are substances not mixed together.
Explanation:
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Answer:the main use of lipids is to store energy
Explanation:If we eat a lot of food, we don't really need all of the energy that we get from it. So, our body stores it away for when we need it later. Hope this helps!
Answer:
If we are watching the sky, we see the lightning before we hear the thunder. That is because light travels much faster than sound waves. We can estimate the distance of the lightning by counting how many seconds it takes until we hear the thunder. It takes approximately 5 seconds for the sound to travel 1 mile.
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Answer:
The DNA is transferred to a nylon membrane because it is very difficult to work with
Explanation:
The DNA was transferred up into the membrane as liquid traveled up from the gel toward an absorbent material that was placed over the membrane.
