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marin [14]
3 years ago
11

Why do tumor cells need blood vessels to continue to grow

Biology
1 answer:
melomori [17]3 years ago
3 0

Answer:

Like healthy cells, cancer cells cannot live without oxygen and nutrients. So they send out signals, called androgenic factors, that encourage new blood vessels to grow into the tumor. This is called parthenogenesis. Without a blood supply, a tumor can't grow much bigger than a pin head.

Explanation:

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Assess whether urban or rural areas are more likely to have high levels of smog.
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The urban areas are more likely to have smog than the rural areas.

Urban area can be referred to as the town or city with advances an developments. Since the urban areas have more population density, more electronic items, vehicles and also industries, that is the reason why they are more likely to produce the smog or any other form of pollution.

Smog is a type of air pollution formed dye to the combination of smoke and fog. The most common source of smog is the burning of coal. This can be either due to industries or the fuels of vehicles. Fog can be of two types: Photochemical smog and industrial smog.

To know more about smog, here

brainly.com/question/15728274

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2 years ago
Which of the following is inaccurate in relation to viruses?
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The answer is D.They reproduce independently. It is false because they need a host and can't survive by themselves.

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6 0
3 years ago
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What are downbursts ?
Ray Of Light [21]
<span>a strong downward current of air from a cumulonimbus cloud, usually associated with intense rain or a thunderstorm.</span>
5 0
3 years ago
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The flow of air caused by ____ and the Coriolis effect creates distinct wind patterns on Earth's surface. a. differences in heat
kakasveta [241]
<h3><u>Answer;</u></h3>

Differences in heating

The flow of air caused by <u>differences in heating </u>and the Coriolis effect creates distinct wind patterns on Earth's surface.

<h3><u>Explanation</u>;</h3>
  • <u>Movement of air or flow of air is caused by pressure or temperature differences and is experienced as wind.</u> When there is a pressure difference between two places, a pressure gradient exists, across which air moves from the region of high pressure to the region of low pressure.
  • <em><u>Differences in temperature also causes movement of air or wind know as convection. The air flow caused by temperature difference is observed in the case of sea and land breezes, because of the difference in temperature between the sea and the land.</u></em>
4 0
3 years ago
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What do you think happened to both the elk and aspen tree populations as a result of removing wolves from the park?.
Step2247 [10]

Answer:

When wolves were removed from the habitat, the elk thrived, causing a population increase. more elk means an increase in the need for food. The leaves of an aspen tree make good food for elk causing over-grazing and soon, the "aspen trees will be eaten out."

Explanation:

4 0
2 years ago
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