The correct answer is d. morula.
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A morula is a stage in early development, formed 3–4 days after fertilization. It is a 16-cell mass which forms a solid ball contained within the zona pellucida. A morula develops into a blastocyst.</span>
Answer:
react with antigens and destroy them
Meteorite: If a small asteroid<span> or large </span>meteoroid<span> survives its fiery passage through the Earth’s atmosphere and lands on Earth’s surface, it is then called a meteorite. Another related term is bolide, which is a very bright meteor that often explodes in the atmosphere.</span>
you could find the answers if u look up the name of it like
4.3 powering the cell: cellu.... answer
