"Answer DThe outermost layer of old epidermal cells are sloughed off and replaced every 15 to 30 days. The sebaceous glands secrete sebum which maintains the skin pH between 3 and 5. Bacteria which metabolize sebum live as opportunistic pathogens on the skin and cause skin infections."
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Under normal light conditions auxins are spread out in the plant. But when sunlight varies, auxin is broken down on the sunnier side of the stem. The higher concentration of auxin on the shady side causes the plant cells on that side to grow more so it bendstoward the light.
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Muscle energy and stroke rates of emperor penguins , implication for muscle metabolism and dive performance.
The impact craters on the moon are created by collisions made by other asteroids many thousands of years ago
Answer:
C
Explanation:
Natural Selection can cause micro evolution, or a change in allele frequency over time