The fossil records shows the rate of speciation is the same for all taxa .
a. true
b. false

False

Explanation:

The rate of speciation varies. The fossil record shows that some taxa speciate rapidly while others remain nearly unchanged for many million years and are called living fossils. Actually, there may be periods of rapid speciation and periods of slow speciation for the same groups, depending on the conditions. There are times that are known for the rapid appearance of many species, such as after mass extinctions.

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.