Answer:
Proteins reflect DNA sequences, so scientists study proteins to look for genetic similarities and differences in organisms.
Explanation:
One, a lot of mass extinctions are based on theories by scientist. Two, they all caused major changes in the Earth's systems (Ex. ecology, atmosphere, surface, and waters). Three, they all have theories on what caused it.
Also this is obvious but in all mass extinctions they wiped out a lot of lifeforms, 90% of anything that has EVER lived on the Earth is extinct.
Hope this helps! :-)
Answer: The buccinator muscle is innervated by Facial nerve.
Explanation:
Buccinator muscle is a thin quadrilateral facial muscle that is between the interval of the mandible and maxillae at the side of the face. It form the anterior part of the cheek to the teeth and help in holding the cheek to the teeth. It also help in chewing. It is innervated by the buccal branch of the facial nerve.
Answer:
tricuspid valve would be the entrance to the heart
The right answer is B.carbon fixation.
Rubisco, by its full name ribulose-1,5-bisphosphate carboxylase / oxygenase, is the key enzyme for the fixation of carbon dioxide CO2 in plant biomass by initiating the Calvin cycle, in relation to the solar energy captured. by the chlorophyll at the origin of the processes of photosynthesis. It catalyzes both carboxylation and oxidation of ribulose-1,5-bisphosphate.