According to the theory of island biogeography, the two main processes controlling the number of species at any given time are…
a. predation and competition
b. migration (including immigration and emigration) and extinction
c. birth and death
d. humans and weather
e. natural selection and catastrophes

b. migration and extinction

Explanation:

The theory of island biogeography states that the main processes responsible for controlling the equilibrium and number of species on an island are migration (immigration and emigration) and extinction. Immigration refers to the new species that colonize the island, while emigration refers to the species that move to another region. Finally, extinction refers to the number of species that have been previously established but get extinct.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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