In a cactus, carbon is fixed only during the day. this is because cacti need sunlight to perform photosynthesis. Have a great day :)
I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer <span>surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.</span>
Answer:
Compound
Explanation:
It is a chemical compound because it is something composed of one or two elements.
In polar regions vapor deposition is the primary method of crystal growth in the upper fairing
Explanation:
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Answer: A and D
Explanation: Sclerenchyma cells are thick cells that provide support in plants. They have thick cell walls lined with lignin. They possess extremely thick cell walls which gives rigidity and support to the plant body. Their main and primary function is to give support and structure to the plant.
Sclerenchyma cells don't have protoplast that mean the cells are dead at maturity.