Is the letter A) sunlinght and nutrient availability
Answer:
See explanation below.
Explanation:
Viruses cause problems when they enter the body and begin to grow and reproduce. They can have byproducts that are harmful. Strep throat for example gives off substances that cause inflammation in the throat. Some viruses can cause serious issues such as nerve damage, like polio. So the immune system works to recognize and deal with cells that might cause harm.
The first time that a particular virus moves in and attacks the body, the immune system - and the white blood cells - might be slow to recognize the issue and take some time to swing into action. But the next time that particular germs shows up, the body is ready for it and reacts much more quickly. The body us designed this way so that harm by invading germs can be halted or minimized.
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Answer:
They contain protein fibres that can contract when energy is available, making the cells shorter.
Answer:
Cellular specialisation is the process by which an initial undifferentiated cell, gets specialized (attains a structure and function characteristic of a given cell type). In this case, the embryonic stem cells, undergo specialisation to give the many different cells and tissues of the body. Without cellular specialisation during embryo development, we wouldnt have all these varying tissue types fine-tuned to their functions.
