Dr. Lange discovers a colony of bacteria living in an

extremely acidic environment. While observing the colony,

she finds that the bacteria are autotrophs.

Which best describes the bacteria discovered by the

scientist?

They are probably archaebacteria because they are

autotrophs.

They are probably eubacteria because they are

autotrophs.

They are probably eubacteria because the colony lives in

an extreme environment.

They are probably archaebacteria because the colony

lives in an extreme environment.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.