Capa de la atmosfera mas proxima al planeta tierra, climatologicos Donde se desrrolla La mayoria de los fenómenos. <span>a) ionosfera </span><span>b) estratosfera </span><span>c) exosfera </span><span>d) troposfera</span>
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The correct answer is muscularis externa.
The muscularis externa refers to a section of muscle in various organs in the vertebrate body, adjacent to the submucosa. It is accountable for the gut movement known as peristalsis.
In comparison to the majority of the remainder of the digestive tract, the muscularis externa of the upper section of the esophagus comprises of striated muscle. It is accountable for peristaltic movement and segmental contractions in the GI tract.
These muscles make the movement of food and churn in combination with the digestive enzymes down the GI tract. The muscularis externa comprises of a longitudinal outer muscular layer and an inner circular layer.
Answer:
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere
Explanation:
Answer:
While on his voyage on the Beagle,while in Galapagos Island he observed that Finches(birds) across the island are similar but different in the structure of their beaks. This mystified him and he puzzled on thus on why there were differences in the beaks shapes.
He therefore postulated from the observation that beak shapes of these birds must be responsible for the adaptation to their habitats.Thus these birds must have come from common ancestors,(and the need to survive by adaptations to different environments is responsible for the beak shapes). The driving force for these phenomena is Natural selection.Therefore,where the size of beaks is the needed adaptation for survival,birds with larger sizes will be selected over those with smaller beaks for eating Feeds(selection pressure) and therefore will be better adapted and naturally selected than smaller birds.
Darwin predicted that the dormant traits(large beaks) will remain in the population as the parents pass these to their offspring from generation to generation,while the population smaller beaks which could not resist the selection pressure will fizzled out.
Thus the better adapted larger beak population will dominate and evolved after a long period of time.Thus all organisms with adaptations and naturally selected on earth must have evolved from a common ancestor.
Although Darwin proposed these,he lacks knowledge of genetics,therefore he could not explain how dominant traits for adaptation are inherited from one generation to another.However,mutation which gives rise to variations is driving force for the changes in structural characteristic for adaptation.Gene flow,gene drifts,together with natural selection are the driving forces.
Explanation:
Answer:
Law of Segregation: When gametes form, alleles are separated so that each gamete carries only one allele for each gene. Law of Independent Assortment: The segregation of alleles for one gene occurs independently of that of any other gene* Principle of Dominance: Recessive alleles will be masked by dominant alleles.
