Answer: b. Water molecules
When sunlight is absorbed by one of many pigments present in photosystem II the light energy is distributed from pigment to pigment until it reaches the reaction center of photosystem II. The electrons present in the reaction center jumps to higher energy state on receiving light energy. Each high energy electron is passed to an acceptor molecule (plastoquinone) and replaced with an electron produced by splitting of water. The splitting of water produces oxygen and electrons. The high energy electrons are transferred to electron transport chain. The energy present in these electrons creates a gradient in the thylakoid membrane of chloroplast. The gradient facilitates the flow of H⁺ ions across thylakoid membrane and which lead to the production of ATP by enzyme ATP synthase.
Therefore, water is required to produce electrons in photosystem II.
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Molecules such as glucose and amino acids can be absorbed from the digestive tract and a renal tubule by the process of facilitated diffusion, which involves a carrier protein that can transport a molecule across the cell membrane down its concentration gradient. The process involves a process of spontaneous passive transport of molecules or ions across a biological membrane via specific trans-membrane integral proteins.
Answer:
by smelling
Explanation:
lactic acid has a sour sharp briny scent, while alcohol.. well we all know how that smells
Answer:
we do it to select the best seeds
the seeds floating on the top are bad seeds which are empty inside
the seeds that are on the bottom are good seeds they are heavy
Answer:
Energy is gained when the light energy that gets taken in by the chloroplasts turns water and carbon dioxide into glucose, which the plants use as food, and oxygen gas, which is released.