regulating the chemistry of our atmosphere and water supply. biodiversity is directly involved in water purification, recycling nutrients and providing fertile soils. experiments with controlled environments have shown that humans cannot easily build ecosystems to support human needs; for example insect...
scrub the oysters under running water to clean shells. place oyster, flat side up, on a board and press onto end opposite hinge using a cloth to protect hand. insert tip of oyster knife next to hinge, push firmly against hinge and pry the shells apart, sliding the knife against the inside of the top shell...
, they are all soft on the inside. they are one of the largest animal groups with about species worldwide which make up about a quarter of all marine animals. in australia there about species. molluscs are found in marine, freshwater and land habitats. there are great differences in the size, structure...