Answer:
Epidermal cells secrete the waxy hydrophobic substance cutin that polymerizes on the surface, forming a barrier to water evaporation. Epidermal cells are transparent because their plastids remain small and undifferentiated; hence light readily penetrates through to the photosynthetic tissues beneath the epidermis.
Explanation:
The pulmonary vein brings the oxygenated (clean) blood to the left atrium.
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2. Removing a phosphate group from an ATP molecule, the other processors will need energy
It is a vestigial Structure.
Explanation:
