Reaction I think sorry if it’s wrong also are there answers to choose from?
Answer:
The Union Pacific officers were east coast based investors and they hired mostly Irish immigrants, freed African American former slaves, and civil war veterans. The Central Pacific officers were west coast based and they hired mostly Chinese immigrants to do the building work on the western half of the railroad.
Explanation:
Answer:
The definition of speciation is the formation of new species throught the course of evolution. There are many different ways it can occur.
- Geographic Isolation - Seperating two species, so that they are in different habitats. Over time these species get acquainted to heir habitats and start evolving to fit in it. Suppose there is a big lake where a species of fish lives, and the lake gets seperated. One side of the lake prefers dark fish and the other prefers lighter fish. On one side, dark fish becomes more prevalent and light fish becomes more prevalent on the ohter side. Soon, this species will split into two species, based on how different they are on the color of their scales.
- Temporal Isolation - This is when species mate a different times of the year. One example is if you have a bunch of frogs. Most of them mate in the summer. All of a sudden, some of them mate in the Spring as well. Soon these frogs mate a different times and become different species as they don't mate at the same time. The frogs that mate at differnt times can no longer, be the same species.
- Behavioral - This is when species have different mating calls or courthsips. Lets say you have birds that sing a specific tune to mate and then one day, another group fo birds in the same species sing a different tune. Soon, these two bird species will be different as they sing different tunes and can no longer mate with each other. If they can't mate with each other, they are no longer the same species.
Small cliffs, hills, beaches, lakes and streams are the landforms that cover long island.
