Why are most of the world’s deserts located around 30 degrees north or south latitude?

____________ are a group of invertebrates that were the first to develop a complete digestive tract with 2 openings.

Which terrestrial biome experiences warm temperatures year round, abundant rainfall, and is the most diverse of all the terrestrial biomes?

Which animal below has no symmetry at all?

Interactions among two different species are known as interspecific interactions.

The terrestrial biome that receives fairly evenly distributed precipitation year round and supports deciduous trees in mid-latitude regions is called the ____________ biome.

The permanent loss of a species on the local level is also called _________.

Duckbill platypuses and echidnas are ___________.

__________ biomes are treeless and experience periods of continuous light in the summer, continuous darkness in the winter, and very cold temperatures.

____________ are a group of invertebrates that were the first to develop a complete digestive tract with 2 openings.