How did transgressing and regressing seas affect the quantity and diversity of life forms in the
Paleozoic? What will be an ideal response?
ANS:Transgressing
seas opened up environments that allowed marine organisms to evolve into new species
and increase their numbers. During the following regression, environments would be lost, and there
would be a mass extinction of many invertebrate species. The mass extinction was then followed by
transgressing seas and a rediversification of species and an increase in numbers. The life forms did not
always come back in the same way; for example, large organic reefs that were common in the early
Paleozoic were replaced by small patch reefs in the Late Paleozoic.
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When a population has unlimited resources, it grows ________. When a population grows at a fixed rate per amount of time, it grows ________
A) exponentially; logistically B) logistically; logistically C) logistically; exponentially D) exponentially; exponentially
The most interior division of the planet Earth is the core, which is liquid at its center because of
extreme pressures, but solid toward the Earth’s surface. Indicate whether the statement is true or false.
Curving chains of volcanic islands and seamounts, almost always found parallel to the concave edges of trenches are
called ____________ ____________ Fill in the blank(s) with the appropriate word(s).
Where did European colonization of Australia and Oceania begin?
A) Fiji B) the Marshall Islands C) the Cook Islands D) New Zealand's North Island E) Australia