Earth has gone through 4 major changes to its atmosphere over its history. Each atmosphere is defined by how it was created. What is the correct order of atmosphere creation methods for each of the 4 historic atmospheres? Question 4 options:

Outgassing --> oxygenation --> accretion --> oxygenation

Water condensation --> accretion --> outgassing --> oxygenation

Accretion--> outgassing--> water condensation --> oxygenagion

Outgassing --> water condensation --> oxygenation --> accretion

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

the correct answer is b