Answer:
D. DDT
Explanation:
DDT is highly persistent in the environment means that it break down very slowly in the environment. The half-life for DDT is from 2 to 15 years. Half-life is the time needed for the degradation of half of the compound. Persistent bio-accumulative toxic substances (PBTs) are chemicals that break down slowly in the environment and its accumulation in living organisms are toxic. Some PBTs are dispersed through air currents while some uses other environmental pathways, resulting in contamination of regions far from their points of origin.
Answer B is false. An element is a type of atom and you do not need to combine two atoms to get a specific element. Combining two atoms will leave you with a compound not an element.
Answer:
3
Explanation:
Atoll reefs are generally located in lagoons
Answer: it could mean you are nervous people often refer butterflies to a nervous jittery feeling in their stomach or it could mean your pretty or when people call other people names and things like that then you could say im just a catterpillar now but im gonna transform into a beautiful butterfly soon id.k im not really sure
Answer:
The answer is alleles :)
Explanation:
The two versions of the same gene are called alleles. The two alleles are formed at the same position, or locus, on the chromosome. REMEMBER: THE 2 ALLELES ARE GOTTEN FROM THE 2 GAMETES OF SEXUAL REPRODUCTION. THAT IS WHY THEY CAN DIFFER.
I hope I helped you !
