4) Clouds usually form when A) air temperature reaches the dewpoint
B) evaporation has warmed the surrounding air
C) relative humidity is 0%
D) condensation nuclei have been removed from the air

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Tides that occur during the new and full moons

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases