Answer:
He is probably suffering from cancer if the tumor is cancerous
Hope this helps ;-))
Answer:
<em>(I) Lamarckism or Theory of Inheritance of Acquired characters.</em>
This theory is based on the comparison between the contemporary species of Jean Baptiste de Lamarck's time to fossil records.
<em>(II) Darwinism or Theory of Natural Selection.</em>
Charles Darwin made an extensive study of nature for over 20 years, especially in 1831-1836 when he went on a voyage on the famous ship “H.M.S. Beagle” and explored South America, the Galapagos Islands and other islands.
<em>(III) Mutation theory of De Vries.</em>
The mutation theory of evolution was proposed by a Dutch botanist, Hugo de Vries (1848-1935 A.D.) in 1901 A.D. in his book entitled “Species and Varieties, Their Origin by Mutation”. He worked on evening primrose (Oenothera lamarckiana).
<em>(IV) Neo-Darwinism or Modern concept or Synthetic theory of evolution.</em>
The detailed studies of Lamarckism, Darwinism and Mutation theory of evolution showed that no single theory is fully satisfactory. Neo-Darwinism is a modified version of theory of Natural Selection and is a sort of reconciliation between Darwin’s and de Vries theories.
Answer:
Spinal cord injury (SCI) often leads to an impairment of the respiratory system. ... physiology, Mechanical ventilation, Phrenic nerve pacing, Tetraplegia, Paraplegia ... The neural circuitry commanding the activation of the diaphragm has been well ... The contusion model also allows one to examine various strategies
Explanation:
Spinal cord injury (SCI) often leads to an impairment of the respiratory system. ... physiology, Mechanical ventilation, Phrenic nerve pacing, Tetraplegia, Paraplegia ... The neural circuitry commanding the activation of the diaphragm has been well ... The contusion model also allows one to examine various strategies
Answer:
Movement of solutes and solvent molecules across the membrane occurs by 2 methods - active transport and passive transport.
In passive transport energy is not needed. It occurs against the concentration gradient i.e. from higher concentration to lower concentration. The passive transport is 2 types - simple diffusion and osmosis.
The diffusion is the transport method where solute particles move across the cell membrane. This is simple diffusion as the solute particles like proteins, carbohydrates, amino acids, move across the membrane from lower concentration to higher concentration.
Osmosis is another type of diffusion where the solvent molecules / water molecules transport across the membrane. It is also not required energy and happens against concentration gradient. This is the very reason cells show the changes in size in hypotonic and hypertonic solution.
The active transport is the movement of solute/ solvent molecules across the cell from lower concentration to higher concentration. This also includes the diffusion and osmosis. But here diffusion is known as facilitated diffusion as it required carrier proteins for transport of ions, proteins into the cell. This method also requires ATP for transport.
The facilitated diffusion establish the concentration gradient as it deposits more solute particles from lower concentration region to higher concentration region. e.g of such transport are absorption of glucose, amino acids, osmoregulation, and urine formation.
But the passive transport / simple diffusion is saturated by substrate. Because it tries to maintain the equilibrium between the gradient difference.
The answer is option (3).
Amino acids are joined together to form proteins.
Living organisms have enzymes which are capable of linking amino acids together by creating a peptide bond between the amino acids. This process takes place in the A and P site of ribosomes in the cell during translation.
One such enzyme is called peptidyl transferase. If an organism lacks such an enzyme, synthesis of the proteins catalyzed by that particular enzyme in its cells will not take place. If amino acids cannot be joined together, then a polypeptide chain, which forms the primary structure of the protein will not be formed.
