For questions 17-21, write the letter of the definition that best matches the term or phrase in the space provided : 17. Quasar
18. Cosmic background radiation
19. Nova
20. Protostar
21. Pulsar
A. A shrinking region of space flattened into a disk with a central concentration of matter.
B. An object that produces energy at a high rate at the center of some galaxies.
C. A neutron star that emits radio waves.
D. Possible evidence of the big bang.
E. A large, bright explosion of a white dwarf caused by pressure building up

(Which Letter should go on what box up top? Please help! <3)

Which of these parts of the membrane large moecules pass through it ?

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.

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?