When a muscle contracts, a bone will move. When a bone contracts, a muscle will move. ... When a ligament contracts, a tendon will move.
<span>Proto-oncogenes are genes that normally help cells grow. When a proto-oncogenemutates (changes) or there are too many copies of it, it becomes a "bad" gene thatcan become permanently turned on or activated when it is not supposed to be. When this happens, the cell grows out of control, which can lead to cancer.....Is this what you need ?</span>
Here are a list of some limiting factors hope it helps!
• Light
• Water
• Space
• Food
• Temperature
• Predators
• Pollution
• Disease
Answer:
*Every student may not have access to internet.
*Learning on gadgets may distract the mind .
*It is not effective way to teach.Everyone may not have good environment for learning.
