B. Carbon fixation begins the Calvin Cycle.
Answer:
A.The hole in the ozone layer
Explanation:
• Montreal protocol is an international treaty that was signed to control the use of substances that are resulting in the depletion of the ozone hole.
This treaty was signed in the year 1987 and became effective form 1989.
• Since the time that this treaty has come into force, there has been a significant improvement in the ozone hole that was observed over Antarctic as it's size has decreased.
• This improvement has been possible because the treaty helped to phase out chemicals such as chlorofluorocarbons, carbon tetrachloride, etc. that are responsible for ozone hole depletion.
Ye because ur looking at a grossly bear very scary and also it can bite u so hard that ur brain is gonna splatter everywhere into tiny bits of chunks
<span>Proliferation of lymphocytes occurs immediately after activation, as well as the encounter of antigen. First, these antigen are bound, after which activation begins. Activation immediately leads to proliferation, as well as differentiation. Proliferation is an increase in the number of something, in this case, in the number of lymphocytes, or white blood cells. </span>
Hi!
It's interesting to note that evolution is a <em>proven fact</em>. It is also interesting to note that a <em>theory </em>can be a <em>proven fact. </em>
So, with this in mind, the idea of evolution by natural selection is a <em>theory. </em>A theory cannot become a law!
It also isn't a hypothesis, as it is far beyond that. A hypothesis is just what you think will happen in an experiment.
This is a theory!
Hopefully, this helps! =)
