Which of the following is a true statement? land mammals such as bats, cats, dogs, cattle and mammoths became common during the neogene period. the first whales evolved during the quarternary period. during the quarternary period, the earth heated up. falling sea levels and colliding continents created connections between continents that led to great movements of land animals during the neogene period.

Land mammals became more common in the Quaternary period, which came after the Neogene, so the first statement is not true.

FIrst whales evolved 50 million years ago and the quaternary period began 2,6 years ago, so the first whales did not evolve during this period.

The quarternary period is famous for its ice ages, so the Earth did not heat up during this period.  

There was indeed a rise in the ocean levels during the Neogene period, so this is a true statement