Gene—>DNA—>Chromosome
Gene: a section of DNA
Chromosome: combination of sections of DNA
Most sponge body plans are slight variations on a simple tube-within-a-tube design. which of the following is a key limitation of sponge body plans? sponges lack the specialized cell types needed to produce more complex body plans. the reliance on osmosis/diffusion requires a design that maximizes the surface area to volume ratio of the sponge. choanocytes must be protected from the hostile exterior environment. spongin cannot support heavy bodies.
The region of the vertebral column that is most accessible from a posterior surgical approach is the sacral region.
The vertebral column is popularly known as the spinal cord or the backbone. The structure of the vertebral column provides a semi-rigid function of the structural framework of the body. It also aids support and movement of the body skeleton.
The vertebral column is categorized into five regions:
- cervical
- thoracic
- lumbar
- sacral
- caudal
On the other hand, a posterior surgical approach is applied in the hip replacement process for people suffering from arthritis. The hip is located in the sacral region.
During this surgical approach, the arthritis is being removed and it is being substituted with a metal cup in the socket area and a metal stem at the base of the femur.
Therefore, we can conclude that the vertebral column that is most accessible from a posterior surgical approach is the sacral region.
Learn more about the vertebral column here:
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Answer:
b. Somatic
Explanation:
The somatic nervous system is one of the divisions of the peripheral nervous system. The somatic nervous system delivers the motor information from the central nervous system to the skeletal muscles only. The skeletal muscles generate the responses which are consciously controlled. Therefore, the somatic nervous system regulates the voluntary movements of the body.
So, the voluntary movements of skeletal muscles such as the movement of limbs during walking, smelling a flower, pedaling, etc. are regulated by the neurons of somatic division.
The last one
Mitosis is the process by which a cell divides once to create two daughter cells. These daughter cells are somatic (body) cells.
Meiosis is the process by which a cell divides twice to create four daughter cells. These daughter cells are sex cells (gametes).