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il63 [147K]
3 years ago
9

Can someone please help

Biology
1 answer:
Mars2501 [29]3 years ago
5 0
The first space is 20 and the second space is 40.078.
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4 years ago
Neutrons are located in the nucleus of an atom. True False
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No they surround the atom

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During which step of meiosis do homologous chromosomes pair up?
katrin2010 [14]

Answer:

<u><em>PROPHASE</em></u>

Explanation:

The first stage in Meiosis I is prophase I. During this stage the DNA condenses into chromosomes. During prophase I, homologous chromosomes pair up and exchange sections of DNA. This is called recombination or crossing over

5 0
3 years ago
How might building a dam affect people living nearby?
mamaluj [8]
1. Once a dam is constructed, electricity can be produced at a constant rate. 
<span>2. If electricity is not needed, the sluice gates can be shut, stopping electricity generation. The water can be saved for use another time when electricity demand is high. </span>
<span>3. Dams are designed to last many decades and so can contribute to the generation of electricity for many years / decades. </span>
<span>4. The lake that forms behind the dam can be used for water sports and leisure / pleasure activities. Often large dams become tourist attractions in their own right. </span><span> </span>
<span>5. The build up of water in the lake means that energy can be stored until needed, when the water is released to produce electricity. 
6</span><span>. When in use, electricity produced by dam systems do not produce green house gases. They do not pollute the atmosphere </span>

<span>DISADVANATGES: </span>

<span>1. Dams are extremely expensive to build and must be built to a very high</span>
<span>2. The high cost of dam construction means that they must operate for many decades to become profitable. </span>
<span>3. The flooding of large areas of land means that the natural environment is destroyed. </span>
<span>4. People living in villages and towns that are in the valley to be flooded, must move out. This means that they lose their farms and businesses. In some countries, people are forcibly removed so that hydro-power schemes can go ahead. </span>
<span>5. Although modern planning and design of dams is good, in the past old dams have been known to be breached (the dam gives under the weight of water in the lake). This has led to deaths and flooding. </span>
<span>6. Dams built blocking the progress of a river in one country usually means that the water supply from the same river in the following country is out of their control. This can lead to serious problems between neighbouring countries. </span>

<span>7 Building a large dam alters the natural water table level. For example, the building of the Aswan Dam in Egypt has altered the level of the water table. This is slowly leading to damage of many of its ancient monuments as salts and destructive minerals are deposited in the stone work from ‘rising damp’ caused by the changing water table level.</span>
7 0
4 years ago
Which sentence from the selection supports the idea that the Olympic rings symbolize each participant’s home country?
riadik2000 [5.3K]

Answer:

Each country competing in the games has at least one of the symbol's colors in its national flag

Explanation:

Because this is the only one that it could actually be, this is the only one that is a good answer.

6 0
3 years ago
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