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Blababa [14]
3 years ago
14

Some of the oldest rocks ever found have been estimated to be about 3.5 billion years old. Is it likely that these rocks were pr

esent when Earth was first formed?
A.
No, rock material is constantly recycled on Earth as rock is melted into magma.
B.
No, this rock is probably just a sedimentary rock that was formed by much younger igneous rocks.
C.
No, it is likely that any rocks older than a few hundred years are meteorites from outer space.
D.
Yes, most of the rocks on Earth can be dated back to the time when Earth was first formed.
Biology
1 answer:
morpeh [17]3 years ago
4 0

Answer:

i thin the answer are D

Explanation:

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Answer:

Polyploidy

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In plants, it involves the possession of two complete sets of chromosomes and it leads to the origin of new species.

Hence, the two sets of chromosomes comprises of triploidy (69 chromosomes) and tetraploidy (92 chromosomes).

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Explanation:

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Which zone is most likely to have insects and very little plant life?
julsineya [31]

Answer:

The right answer is D. The benthic zone

Explanation:

The limnetic and the littoral zone  all get a lot of sunlight so there are a lot of plant life. The pelagic zone hosts a variety of plant species so this cannot be the correct answer. That leaves us with the benthic zone.

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