Answer:
Diffusion is the movement of water across a selectively permeable membrane.
Explanation:
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Answer:
evolution of life on Earth
Explanation:
Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth's biodiversity greatly increased.
1. mother to fetus 2. through exposure to the antigen (virus, toxins, or cancer cells).
