If a mosquito feeds on a bird that is infected with the West Nile Virus and then feeds on a human being who then contracts the virus, what role is the mosquito playing in the infection of the person?
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The host
The pathogen
The vector
The parasite
The symbiotic

What sre the effects of hemolytic disease of a newborn

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun

80 points pls brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?