Consuming high levels of pro vitamin A carotenoid, which come from plant sources, does not lead to vitamin A toxicity. This statement is true.
Vitamin A is obtained mainly from the food products we eat, but it is also synthesized in our body via pro vitamin A carotenoids like beta-carotene. When high amounts of pro vitamin A carotene are consumed in the diet of a person they are converted very slowly and naturally in our body into vitamin A in the intestine.
Vitamin A has many benefits including defense from pathogens, strengthening immune system, improving vision, and also improving overall growth and development of the body etc.
To know more about vitamin A refer to the link below
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The ostrich doesn't strictly live in one biome, while it is true that they live in a warmer, dryer climate most of the time. But they are also known to live in colder regions as well, they live a nomadic lifestyle, as long as they can find food and water they can live happily.
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Answer:
When the muscle cells can't get oxygen fast enough to meet their energy needs through aerobic respiration.
Explanation:
That's all I can help u.
The correct option is ANALOGOUS STRUCTURES.
Analogous structures are structures that are similar because of the functions they carry out and because of their external appearance. But these structures are different internally.<span />
Answer:
The xylem is a vascular tissue responsible for the transportation of water from the root to other parts of the plant. While the phloem is responsible for the transportation of soluble organic nutrients gotten from photosynthesis, to other parts of the plant.
Explanation:
The xylem is a hollow tube made up of dead empty cells that continues throughout the whole length of the trunk of a plant. The cohesive (i.e water attracts water) and adhesive (i.e water attracts xylem) nature of water makes it possible for water to move from the root which is the major source of water transported, up to the topmost leaf of the plant in a process called capillarity. An upward pull, which keeps the upstream of water continuous is generated during transpiration (i.e the loss of water from the plant).
The phloem, which is also hollow in nature, transports glucose from photosynthetic regions of the plant, majorly the leaf, to other parts of the plant. This process is called translocation.
