I am sorry, I am not good in this area but, I found a site that could help you: http://www.chemicalelements.com/elements/ca.html
I know I am not supposed to post links but, I found help
Answer:
c. provide the energy that establishes the proton gradient
Explanation:
In terms of productivity given a particular ecosystem's location (in sea or on land) the ecosystem of the ocean is far more productive given the fact that is has relatively little access to sunlight and nutrients.
Let's go through the choices!
A. They're unaffected by positive self-talk.
Let's pretend you are scared of thunder. If you tell yourself, "I will not let thunder scare me; it will not hurt me," you will be less scared! So, A is not the answer.
B. They're harmless, because they're imaginary.
If you are scared of something, it can damage your mental health, which is not harmless. So, B is not the answer.
C. They're a kind of negative self-talk.
Being afraid of something is usually due to an overexaggeration in your mind. So, C is a good answer.
D. They're a kind of positive reinforcement.
Being scared is not positive. So, D is not the answer.
The answer is C!
Hope I helped! :)
Wrong. Most of the U.S. experienced significant in- creases in precipitation and streamflow (and de- creases in drought) during the second half of the 20th century
