Answer: Various proxy measurements have been used to attempt to determine atmospheric carbon dioxide concentrations millions of years in the past. These include boron and carbon isotope ratios in certain types of marine sediments, and the number of stomata observed on fossil plant leaves. 2 record of over 500 million years.
Explanation:
Answer:
if it had excess nutrients
Explanation:
it increases the amount of plant and algae growth
Answer:
Hydrogen bonds exist between the two strands and form between a base, from one strand and a base from the second strand in complementary pairing.
Answer:
Mobility.
Explanation:
Mobility is the term used for all types of movement such as walking , running, swimming and flying etc. Mobility refer to the movement, those organisms which has the ability to move from one place to another is known as mobile organisms e.g lion, birds, tiger and humans etc, while on the other hand those organisms that are unable to move from place to place is called immobile organisms.