Chromosomes in the parent cell before they divide into daughter cells through mitosos
a. split in half
b. double
c. triple
d. quadruple

➷ It would be B. double.

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i think the answer is composed of atoms

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers