Meanings of multicellular creatures in English

Under artificial pressure to become larger, single-celled yeast became multicellular creatures.

These complex multicellular creatures were the first animals, and they were a major success.

In most multicellular creatures, all the cells in all the tissues share their full genome, with different parts of it switched on and off.

Suddenly, Earth leapt from being dominated by single-celled bacteria to a world teeming with exotic multicellular creatures, all in a geological blink of an eye.

"If we start making multicellular creatures, will they take over?" Fast-forward to the twenty-first century, and DNA is still alive and well.