Biodiversity, is a great natural resource that must be protected. The introduction of forgeign species to an environment can cause the native species living there to decrease in number or to become extinct. what is another major threat to world wide diversity? A) Prohibiting killing of endangered species
B) Setting land aside for endangered species
C) Allowing poisonous chemicals to enter food webs
D) Limiting quantities of fish caught in Earths oceans

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?