Which organisms have the least amount of stored energy in an ecological pyramid

Tertiary Consumers get least amount of the energy.

In an ecological pyramid less energy is available to organisms in the upper level because each organism releases some of the chemical energy as food and to the air as thermal energy .Therefore primary consumers get almost 10% of autotrophs prduced energy. The second consumers in the pyramid get 1% from primary consumer. In the case of tertiary consumers, they get only 0.1%. Hence the top consumer of a food pyramid receives the least energy.

1. Cervical

2. Lumbar

Explanation:

Spinal enlargements are the conspicuous regions in the spinal cord from where spinal nerves to and from limbs exit and enter respectively. Cervical enlargement is also called the superior enlargement. It starts from C4, the fourth cervical vertebra and extends to T1, the first thoracic vertebra. Cervical enlargement is the site from there the nerve that supplies to and come from the upper limbs arise.

Another enlargement is the lumbar enlargement. It is also called inferior enlargement or lumbosacral enlargement and extends from the ninth to the twelfth thoracic vertebra. It is the site from where the nerves to and from the lower limbs arise.