Ascientist hypothesizes that the lack of chinook salmon is negatively affecting the orca population. would this hypothesis need to be tested by another scientist in order to become a theory? why or why not?

a) it is not done because scientist do not make mistakes.

b) it is not done because scientists do not read each other’s work.

c) it is done because peer review and the consideration of an alternative explanation should be considered.

d) it is done because peer review is not mandatory when developing a theory.

The answer is C. It is done because peer review and the consideration of an alternative explanation should be considered.

Explanation: this is the correct answer because when other scientist view other scientist work it is to indicate that the hypothesis and observations that they made is correct.

D) Trees

Explanation:

Tundra is a type of biome which is characterized by its extremely cold temperature and low precipitation as a result of which this biome has permafrost soil. In such climatic conditions much vegetation is not possible in this biome and only little plants like mosses, shrubs, lichens etc. are able to grow in Tundra. Big vegetation like trees are unable to grow in such extremely cold environment. The reason why the weather is so cold in Tundra is because this biome is situated in polar regions and therefore the sun rays do not fall on them directly. Through out the year Tundra receives slanting sun rays which result in extremely cold weather.