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Photosystems are functional and structural units of protein complexes involved in photosynthesis. Together they carry out the primary photochemistry of photosynthesis: the absorption of light and the transfer of energy and electrons.
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Answer:
Passive immunity: Immunity produced by the transfer to one person of antibodies that were produced by another person. ... For example, antibodies passed from the mother to the baby before birth confer passive immunity to the baby for the first 4-6 months of life.
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Explanation: Second Trimester: The Baby at 20 Weeks
Your baby is covered by fine, feathery hair called lanugo and a waxy protective coating called vernix. Eyebrows, eyelashes, fingernails, and toenails have formed. Your baby can even scratch itself. Your baby can hear and swallow.