Which statements apply to comets? Check all that apply.

formed of ice, rock, and dust

develop tails near the Sun

Explanation:

Comet is a smaller celestial body which is mainly composed of ice and dust.

The other components of this comet are rocks and gas.

When any comet approaches a sun it can deliver a tail of dust or gas.

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.