5. Choose the correct sequence: Fertilisation Ball of cells Foetus Embryo a) Zygote b) Fertilisation Ball of cells Foetus Embryo Zygote Embryo Fertilisation Foetus c) Ball of cells d) Fertilisation Zygote Zygote Ball of cells Embryo Foetus

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

very

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