Answer: to explain what keystone species are important in each ecosystem
Explanation:
The overall theme of the article is to explain what keystone species are important in each ecosystem.
Keystone species is referred to as an organism that defines the ecosystem as a whole. They help define the habitat's biodiversity.
It should be noted that despite the fact that every living organisms depends on each other, some species are more vital than others and when they're removed, there will be a drastic change in the habitat.
Answer:
Plants must have evolved in a manner where they require less water and nutrients as these two were the only limiting factor and carbon dioxide was in abundance
Explanation:
Some 400,000 years ago, the concentration of CO2 was very high and was near to 1000 ppm. At this high concentration of CO2 the photosynthetic activity of plants becomes very high and thus since 400,000 years ago plants could have evolved in an uncontrolled manner but this does not happened. So the reason behind this is limitation in terms of soil and its constituent’s nutrients availability and also limited supply of water.
Therefore, if plants would have evolved themselves in a manner where they require less water and nutrients then they would have grown limitless.
Eu. cells are animal and plant cells and have nucleus and all normal organelles, pro. cells have free floating dna and are normally bacteria
<u>Answer:</u>
<em>Under constant volume in a closed system the relationship between temperature and pressure is directly proportional. </em>
<u>Explanation:</u>
As the pressure increases in the system the temperature also increases in the same order. It is explained in the <em>Gay-Lussac's Law</em>, also known as pressure-temperature law. If a gas is compressed i.e.
The pressure is reduced inside a container (constant volume) then the temperature inside the container is increased, it is practical demonstration of the<em> pressure-temperature law</em>. This mechanism is also used in refrigerators.