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Vlad [161]
3 years ago
11

Using a Periodic Table, identify two elements

Biology
1 answer:
sergejj [24]3 years ago
6 0

Answer:

Na, Si, Mg.

Explanation:

  1. Sodium
  2. Silicon
  3. Magnesium
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How might genetic drift be important in a small population. see section 23.4 (page 470) . view available hint(s) how might genet
frutty [35]
The correct answer is it decreases genetic diversity only by reducing population size.  
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The great explanation for this is a bottleneck effect, which is an extreme example of genetic drift. The bottleneck effect occurs when the size of a population is reduced due to a catastrophe. When it happens, only a small, random number of individuals survive the event and pass through the bottleneck. Thus, the genetic composition of the random survivors is now the genetic composition of the entire population which means that the genetic diversity is reduced.</span>
4 0
3 years ago
If a particular strand of DNA is found to be 27% adenine, how much guanine would it contain
Naddika [18.5K]

Answer:

You have 20% of adenine. If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.

Explanation:

6 0
3 years ago
NPK fertilizer are added in the soil to fulfill the need of ________​
mina [271]

Answer:

............. the need of _Nitrogen, phosphorus and potassium_

Explanation:

Each of these fundamental nutrients plays a key role in plant nutrition. ... It's also needed to help plants grow and develop normally. Phosphorus in commercial fertilizers comes from phosphate rock.

8 0
3 years ago
What would happen to an ecosystem if an energy level disappeared? This is meaning in a pyramid.
butalik [34]
This has happened before in Yellow Stone National Park in CA. Removing a species form the Pyramid causes the ecosystem to collapse, as species become over hunted and others are starved. One type of organism could become overpopulated, therefor lack of natural variation.  
7 0
3 years ago
Iorek lives near the North Pole. The snow in his backyard adds water to the atmosphere through _____. transpiration evaporation
barxatty [35]
<span>Sublimation. It's the same effect as evaporation but sublimation means it goes from a solid state (snow) to a gas state. This phenomenon can be seen in your freezer, when ice cubes evaporate the moving particles on the surface fly off to the environment just like in liquids.</span>
5 0
3 years ago
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