<span>The answer is a certain required chemicals must be actively
transported. Blood brain barrier is a
selective membrane that separates blood circulating from the brain and the
fluid of extracellular in the central nervous system. This is also called a
filtering mechanism, the capillaries that carry blood to the brain and spinal
cord tissue blocking the path way of the certain substance.</span>
photosystem 2, photosystem 1, pumping hydrogen..., and making NADPH
We can confirm that the absence of photosynthesis on Earth would cause a mass extinction of most of the species on the planet.
<h3 /><h3>Why would the absence of photosynthesis be so harmful?</h3>
The process of photosynthesis is extremely important as it produces oxygen as a byproduct. The absence of this process on Earth would limit the available oxygen in the atmosphere which would at some point be entirely consumed. From then on, most species on the planet would die out as they require oxygen to live. Most plant species would also die off as they use photosynthesis to sustain life.
Therefore, we can confirm that the absence of photosynthesis on planet Earth could be considered an apocalyptic event as it would cause a near-complete extinction of life on the planet.
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Answer:
leaves more viable offspring than others of its species
Explanation:
Greater fitness is being conferred on an individual organism compared to the other individual member of a species population if that individual does not only just competes favorably for the limited resources available than the rest individuals, but is in fact able to reproduce more rapidly and thereby pass on such favorable traits, which makes them better competitors, to as many of their offspring as possible. Over time, you will find most of the offspring they leave behind more common in the population than the other.
If an individual organism is referred to as having a greater fitness compared to another individual of the same species, what it simply means is that the organism <em>leaves more viable offspring than others of its species</em>.
Adenine to thymine and cytosine to guanine are the base pairings during DNA replication.
