Adna molecule has a unique design that resembles a spiral staircase. scientists call this design a a. double helix. b. spiral structure. c. double nucleotide. d. spiral purine.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

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a. 35°c

b. 25°c

c. 10°c

d. 40°c