Controlled burns would be used in forests a. where there high densities of endangered species, such as tropical rain forests. b. that have heavy recreational use to warn people about the dangers of fires. c. plagued with insects as a cheaper alternative to pesticides. d. that are subject to severe wild fires to remove fuel load and stimulate new growth

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.