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faust18 [17]
3 years ago
7

Based on physical evidence, scientists have concluded that the planet earth probably formed _____ years ago, and the first life

evolved as early as _____ years ago.
Biology
1 answer:
Sonbull [250]3 years ago
5 0
Planet earth was probaly formed 30,thousand years ago the first life probably evolved 29 thousand years ago
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An air mass forms over the North Pole region describe what you think the temperature and humidity of this air mass will be like?
soldi70 [24.7K]

Answer: hope this helps :)

The motion of air mass motion is usually based upon the air flow in the upper atmosphere. As the jet stream changes intensity and position, it affects the motion and strength of air masses. Where air masses converge, they form boundaries called "fronts".

3-D view of a cold front.

Fronts are identified by change of temperature based upon their motion. With a cold front, a colder air mass is replacing a warmer air mass. A warm front is the opposite affect in that warm air replaces cold air. There is also a stationary front, which, as the name implies, means the boundary between two air masses does not move.

The motion of air masses also affects where a good portion of precipitation occurs. The air of cold air masses is more dense than warmer air masses. Therefore, as these cold air masses move, the dense air undercuts the warmer air masses forcing the warm air up and over the colder air causing it to rise into the atmosphere.

So, fronts just don't appear at the surface of the earth, they have a vertical structure or slope to them as well. Warm fronts typically have a gentle slope so the air rising along

6 0
2 years ago
The availability of glucose energy necessary for memory consolidation is most likely to be enhanced by
Ugo [173]
The availability of glucose energy necessary for memory consolidation is most likely to be enhanced by stress hormones.
These hormones, as well as growth hormones, sex hormones, and glucagon, have such an influence on liver that glucose gets secreted into the bloodstream. Glucose is important for many things in our body, and memory consolidation is one of them.
6 0
3 years ago
How can the excessive use of fertilizers effect biodiversity if it is washed into the river
hichkok12 [17]
We know that fertilizier could promote the growth of the plant

When washed to the river, it will accelerate the growth of the water plant that exist within that area,
This occurrence will be not beneficial to the water animal because their habitat will be unnaturally blocked by these plants

hope this helps
7 0
2 years ago
Cnidarian bodies are either in the polyp or medusa form with tentacles surrounding the mouth. What type of symmetry do they have
kap26 [50]

<u>Answer:- </u> <em>Option a  </em>radial symmetry

<u>Explanation:- </u>

Most of the organisms have can either of the two types of symmetry:-

1. <em>Bilateral symmetry</em>- A body is said to have a bilateral symmetry when it can be divided into 2 equal halves on either side of a <em>single</em>  plane.

For e.g if you cut the letter M from middle vertically then you have two equal halves.

2. <em>Radial symmetry</em> - A body is said to be radially symmetrical if  it can be divided into similar halves in <em>any</em> plane. This means that the organism has its body parts arranged around a central main axis.

The <em>cnidarians whether in polyp or medusa from exhibit radial symmetry because if you cut them in any plane you will get equal halves.</em>

7 0
3 years ago
_____tissue covers the outer surface of herbaceous or soft stemmed plants
Vanyuwa [196]
<span>YOUR ANSWER IS GOING TO BE "HERBACEOUS"

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5 0
2 years ago
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