The time period was called the Hadean Eon, and the rocks themselves are nearly 4.4 billion years old
Answer: SELECT ALL THAT APPLY a the synthesis phase b the first growth phase c termination phase d the mitotic phase.
Explanation:
The fish has a single circulation blood passes through the one in each circuit. the fish's heart has two chambers. the first one is the atrium and the second one is the ventricle. the blood entering the heart of the fish goes to the atrium first and then to the ventricle. the ventricle then pumps the blood to the gills.
Answer:
Evolution of cyanobacteria
Explanation:
Early earth was reducing therefore there was no oxygen on early earth. Oxygen first came on the earth due to the evolution of cyanobacteria on earth. Cyanobacteria were the first aerobic bacteria on earth.
This bacteria was able to conduct photosynthesis and split water into Hydrogen and oxygen. This oxygen is released in the atmosphere and created the aerobic environment on the earth.
Cyanobacteria used sunlight energy to split water and by this, they are able to make their own food in the form of carbohydrates. Therefore the correct answer is cyanobacteria.
The body attacks particular foreign invaders and <span>immunity is adaptive.</span>