CROSSING OVER
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Answer: There are very high amount stars in our galaxy but OUR solar system has only one star. That star is known as the Sun.
A solar eclipse is when the moon moves between the earth and the sun, so the moon casts a shadow on the earth
Answer:
The polarity of the phospholipid makes it ideal for a building block of cell membranes.
Explanation:
There is the tails which are hydrophobic (water fearing) and the heads which are hydrophilic (water loving). These properties of phospholipids allow the tails to go towards eachother and heads to face the water which maintains a solid structure allowing certain materials to pass through.