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slega [8]
3 years ago
11

18. Approximately when did the first plants and arthropods appear on land?

Biology
2 answers:
quester [9]3 years ago
5 0

Answer:

C.

Explanation:

LenaWriter [7]3 years ago
3 0

Answer:

C. 444 Ma

Explanation:

The first plants that managed to colonize the land appeared around 470 million years ago, while the first arthropods on land appear i the fossil records around 450 million years ago, so we can say that around the period of 444 million years ago they were well established on land. The first arthropods that started to have terrestrial life were almost identical to those in water, with only minor changes that enabled them to breathe and move more easily. The first plants on land were non-vascular plants. They were small as they initially didn't had deep and well established roots.

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nikdorinn [45]

Answer:

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3 years ago
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In the currently accepted atomic model, an electron orbits the nucleus in a<br> clear, defined path.
Alex777 [14]

FALSE

In the currently accepted atomic model, an electron orbits around the nucleus is NOT in a clear, defined path.

Explanation:

According to modern atomic models, like the Bohr theory, it is difficult to know the exact location and path of an electron around the nucleus. This is partly because the mere act of observing the electrons changes its position. This is because the electrons have negligible mass and therefore ‘hitting’ them with any form of radiation for ‘illumination’ changes its position, behavior, and properties. In addition, the movement of electrons is very rapid such that by the time one observes the instantaneous location of an electron, if it was possible, it will have changed its position.

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Learn More:

For more on modern theories of the atom check out;

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#LearnWithBrainly

6 0
3 years ago
If the genotype for hair color was B for brown and b for blonde, what would the genotype be for a person who was homozygous rece
horsena [70]
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Bas_tet [7]
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3 years ago
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