genetically modified foods (GM foods)

ratites

Subject:

birds without a keel on their breastbones and therefore unable to fly, for example ostriches....

Subject:

very small organisms that are invisible to the naked eye.

Subject:

all the different ecosystems with their numerous and varied organisms.

Subject:

the formation of layers of water of different temperatures in large bodies of water - dams,...

Subject:

an infectious disease that can be spread or transmitted from one person to another.

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