Scientists estimate that there are between 700,000 and 5.1 million fungi on the planet. From your reading of "The fungi: 1, 2, 3 ... 5.1 million species?" by Meredith Blackwell, briefly describe (2–4 sentences) two reasons that this estimate is so broad. In other words, why are recent estimates of fungal species diversity so varied?

The answer is below

Explanation:

1. This is because there is varying degrees or amounts of habitats and areas that yet to be assessed and examined when carrying out the estimates of fungal species diversity which leads to a broad range of estimates.

2.  Also, with the increments in the numbers of different species accumulation that has currently been discovered; a 1.2% increase in species is discovered every year,

Hence, it is ideal to conclude that a large number of species are being discovered in the later research which is making the estimates to be different.

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.

hope this .. .

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.