Answer:
Percent of Guanine = 42%
Explanation:
Given:
Percent of Thymine = 28%.
Find:
Percent of Guanine
Computation:
DNA contain 20% Thymine will have 30% Guanine
So,
Percent of Guanine = Percent of Thymine [30/20]
Percent of Guanine = 28 [30/20]
Percent of Guanine = 42%
Answer:
Option A, oxygen in the atmosphere
Explanation:
The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in Carboniferous period accounted for 35% as compared to 21% of oxygen in the atmosphere in present time.
Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.
All i know is 'hat, it is composed of three layers
Answer:
A cast is the final step that shows the mold. No cast? No mold.
Explanation:
The amphibians were the truly terrestrial vertebrates. They are often described as fish with legs who eventually became reptiles. The reason for this evolution can be credited to the evolution of plans from a group of green algae called the Cambrian Explosion.