The two-layered sac surrounding the heart is the pericardium.
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Answer:
<h3>Mechanical weathering, also called physical weathering, breaks rock into smaller pieces. These smaller pieces are just like the bigger rock, just smaller. That means the rock has changed physically without changing its composition.</h3>
Explanation:
<h2>GIVE BRAINLIST </h2>
A gymnosperm is <span>a plant that has seeds unprotected by an ovary or fruit. Gymnosperms include the conifers, cycads, and ginkgo.</span>
Answer:
Albinism is the "congenital absence of any pigmentation or coloration in a person, animal or plant, resulting in white hair, feathers, scales and skin and pink eye."
It could cause you Death, and/or diseases
