they are layered mounds of deposits made by precambrian algae
Certain changes in a plant or animal could cause unpredicted allergic reactions in some people which, in its original form, did<span> not occur. Other changes could make an organism toxic to </span>humans<span> or other organisms. These concerns range from ethical issues to a lack of knowledge on the effects </span>genetic engineering<span> may have.</span>
Answer:
Spinocerebellar tracts.
Explanation:
Spinocerebellar tracts are afferent neurons that transmit proprioceptive information from the peripheral nervous system ( muscles and joints propricetors) to the cerebellum. It originated from the spinal cord and end at the cerebellum. It carry unconscious proprioceptive sensory information from the muscles, organs to the cerebellum.