Why are cyanobacteria important to early Earth? A. Cyanobacteria produced iron in Earth’s crust.

B. Cyanobacteria preceded the first photosynthetic organisms.

C. Cyanobacteria are the first photosynthetic organisms.

D. Cyanobacteria stopped the formation of rust in the Earth’s crust.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?

Can someone pretty me with this ? it’s urgent.compare the three theories of emotion. here are the three theories of emotion. cannon-bard theory of emotion: the belief that both psychological arousal and emotional experience are produced stimultaneously ( at the same time) by the same nerve stimulus. james-lange theory of emotion: the belief that emotional experience is a reaction to bodily events occurring as a result of an external situation. ( “ i feel sad because i am crying.) schachter-singer theory of emotion: the belief that emotions are jointly determined by a nonspecific kind of psychological (bodily function) arousal and its interpretation, based on environmental ( natural surroundings) cues. which of these theories makes most sense to you? why. your response should be written using proper english spelling and grammar. and it needs to be 10 complete sentences.