True, the plasma membrane is selectively permeable and controls the various substances that are allowed into the cell and that are allowed to leave the cell.
The outer periphery of the inter-vertebral disk is composed of strong fibrous tissue called the Annulus fibrosus. This is a tough circular exterior of the inter-vertebral disc that surrounds the soft inner core, the nucleus pulposus. The outer portion is composed of a ring of ligament fibers that encases the inner core of the disc and securely connects the spinal vertebrae above and below the disc.
The study of chemical reactions would be in chemistry and not biology so thats the answer
Answer:
a. desertification.
Explanation:
Desertification can be defined as encroachment of deserts to areas that were not originally deserts which leads to loss of biological productivity. desertification is caused by some factors which are
- Climate Change
- human activities
- loss of moisture
- drought.
When the above mentioned factors farming, overgrazing, climate change, and/or seasonal drought set in then it changed farmland into land that cannot support plant life.
