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Mariana [72]
3 years ago
5

What evidence suggests that birds evolved from theropod dinosaurs?

Biology
1 answer:
viktelen [127]3 years ago
7 0

Answer:

Feathers

Explanation:

For a long time, feathers were regarded as a uniquely avian feature. Bur recent fossil evidence suggests that feathers, too, evolved in theropods before birds.

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1. Why is Earths Crust the least dense layer?
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Answer:

1. Because it is thick and has relatively low density, continental crust rises higher on the mantle than oceanic crust, which sinks into the mantle to form basins. When filled with water, these basins form the planet's oceans.The lithosphere is the outermost mechanical layer, which behaves as a brittle, rigid solid.

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4 years ago
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5 0
3 years ago
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All adults over the age of 40 experience age-related bone loss. what is the term for this condition?
MakcuM [25]
The answer would be osteoporosis

Osteoporosis comes from word osteo- which mean bones and -porosis which means "pore". The term is used to describe a decrease in bone density which makes them seems like having multiple pores. It is found more in the old patient because the bone formation is decreased.
3 0
4 years ago
Estimating the Age of a Rock Layer
Ganezh [65]

Answer:

Relative dating is the technique to calculate the age of an ancient materials in comparison to another material's age. Layer A is less older, if layer B lies beneath it. Layer A may be 2.5 to 3 million years old.

Explanation:

Before discovery of radioactive carbon dating method, geologists make use of relative dating method in order to determine the age of rock or fossils. The relative dating procedure often referred to as stratigraphy. Though this procedure is not capable of predict absolute age or dating. In relative dating, is mainly based on the fact that the older rock layers will be deeper in respect to the less older rock layer.

4 0
3 years ago
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