Pericardium is a double walled sac enclosing the heart.
Explanation:
. there gills help them to breath oxygen in water.
. there fins help them to move in water
Answer:
Iceberg forms when a glacier
reaches the sea coast and when large chunks of ice calve (break off) and float away.
Answer:
Prokaryotic cells lack a nucleus and membranous organelles.
Explanation:
Prokaryotic cells have the following features: 1. The genetic material (DNA) is localized to a region called the nucleoid which has no surrounding membrane.
Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water.
