Have two tissue layers.

Tendons holds two bones together but the joints permit movement of the bones.

Bonus Question – Which terrestrial animal has the largest heart?

Which one is NOT an adaptation that favored the move from water to land in plants?

Which level of ecology focuses on how environmental factors affect the rate of growth?

Which skeletal type consists of fluid under pressure in a closed body compartment?

Which endocrine organ is responsible for producing hormones that regulate response to stress?

Any new species introduced to a new community is considered to be an invasive species.

Which biome has reptiles doing very well but amphibians could not survive here?

Since birds do not have teeth, they use their ________ to mechanically break down their food.