The regulation of salt and water balance is known as ___.

The annual rings found in the wood of trees are formed by rings of __.

Inner annual rings that no longer function in water transport.

Wetland dominated by grasses.

Plants respond to stimuli by growing.

The stigma, style, and ovary are parts of the __.

Angiosperms, the flowering plants, have an enclosed seed.

Detritivores use the suns energy to produce food by photosynthesis.

Mycorrhizae are mutualistic associations between fungi and the roots of plants.

All of the following factors will keep a population from growing at its biotic potential except