In a population of beetles, some are green, some are brown, and some are mixed. if the beetles live in vegetation, the colored beetle is "least fit" and least likely to survive in that habitat when birds come along looking for food. a. green b. brown c. mixed

B. Brown

Explanation:

In order to understand the answer of the question we need to understand a mechanism called Camouflage  first.

It refers to a process which some animals insects or other living organisms adapt by changing their body color or color combination in such a way that they are less visible to predators. This is basically a survival mechanism which increases their chances to avoid the predator and live safely.

If we talk about beetles they have three colors, Brown , Green and mixed. If beetles are living in an area where trees are highly polluted due to air pollution and have got brownish in colors, in that area brown beetles have better chances of survival because they will not be very visible to predators due to a similarity of their body color with tree colors.

In question, we are asked about Beetles that live in vegetation and vegetation is obviously greenish in color. So brown beetles are least fit in this area because they will be easily visible to predators on green vegetation that clearly lowers their survival chances.

Hope it help!

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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