Phospholipids have two distinct polarities. The phosphate head is always polar, while the two "tails" it has are nonpolar.
reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
D) The AV valves are supported by chordae tendineae so that they do not blow back up into the atria during ventricular contraction.
Answer: Use less paper
Explanation:
Giant pandas live on bamboo, which is scarce because bamboo trees are being cut down to make paper, which is destroying their natural habitat and only food source. By not using fewer paper products, you are helping to protect pandas from extinction.
The solar system is composed of the sun and the planets.
<h3>What is the solar system?</h3>
The solar system is composed of the sun and the planets. The sun lies at the center of the solar system and the planets move around the earth in concentric circles.
Given that the earth is the only inhabited planet, it holds a central place in the solar system. The moon is a non luminous surface. It reflects the light that hits it from the sun to the earth.
The sun and other stars are the luminous bodies in the solar system.
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