Carbon monoxide is not heavier than air. A carbon monoxide alarm should be installed in a location where the alarm will stay clean, and out of the way of children or pets. Refer to the user's manual for specific installation requirements. Â« Back To FAQs List.
A leech is an annelid or segmented worm related to earthworms. Most are aquatic although there are land leeches in the tropics. Some leeches are blood sucking parasites bu â¦ t others are predators.
Marine species are members of one of two classes, Polychaeta (Polychaete worms) or Hirudinea (leeches). A third class, Oligochaeta, includes the well-known earthworms. The phylum is up for a revision as recent research has revealed that the leeches should probably join the oligochaetes, together with the earthworms.o, the annelids now inlcude both segmented and unsegmented worms. They come in a huge variety of shapes and colors. Many of the worms live their lives buried in the sand while others stand up like flowers. Some are microscopic in size, others can reach a length of 3 meters.