B Is the correct answer for your question
Answer:
2.7 billion
Explanation:
This period is referred to as the Great Oxygenation Event. This period saw the evolution of photosynthetic organisms (cyanobacteria) that utilized carbon dioxide (that dominated the atmosphere then) and sunlight to manufacture their energy molecules-glucose. Photosynthesis produces oxygen as a byproduct that is evolved into the atmosphere. As these photosynthetic organisms proliferated on earth, the atmosphere composition changed to become partly dominated by oxygen (which is an oxidaton agent) with less and less carbon dioxide.
Genotypes [ genetic characteristics ]:
50% TT
50% Tt
Genotypic ratio:
2 : 2 : 0
Phenotypes [physical characteristics ]:
100% tall eyeballs
Phenotypic ratio:
4 : 0
Did the hospital make a mistake?
Yes, because the physical appearance of
the baby must have tall eyeballs.
No genotypes of the punnet square include a homo-zygous recessive trait.
Therefore the offspring must recieve a recessive allele from each parent to exhibit it so based on the data, it is impossible to have a baby with short eyes.
Athletes tend to have lower resting heart rates<span> because training programs that build speed, fitness, muscle and endurance also train your heart muscles to pump a </span>higher<span> volume of blood with each heartbeat.</span>
