Where do convection currents occur A. in areas with the same altitude
B. in areas with different pressures
C in areas with different cloud types
D in areas. with the same temperature

Which of the following can be assumed about the layers in areas 2 and 4

You sample a population of butterflies and find that 56% are heterozygous at a particular locus. what should be the frequency of the recessive allele in this population?

Why does competiton happen? a: different organisms have different needsb: there are limited resources in an ecosystemc: there are no predators in an ecosystemd: organisms do not need the same resources (i think it's b but i'm not sure)