Answer:
C
Explanation:
Animals get nitrogen by eating plants or other animals that contain nitrogen. Wen organisms die, their bodies decompose bringing the nitrogen into soil on land or into the ocean. Bacteria alter the nitrogen into a form that plants are able to use
Answer:
Monosaccharides are the monomers of carbohydrates, amino acids are the monomers of proteins, glycerol/fatty acids are the monomers of lipids, and nucleotides are the monomers of DNA.
Explanation:
The fossil is likely to be a mold fossil as the organism's environment likely consisted of soft, moist terrain.
The general shape of the epithelial cells that are nearest
to the lumen during an empty urinary bladder of an individual is transitional
cuboidal epithelium, they are cuboidal in shape as they are relaxed and later
transition when stretched and filled with urine.
Answer:
The neurons interact with each other at synapse through action potential generated in response to the stimulus. At the resting phase, all the ion channels remain closed and the cell maintains a high amount of Na⁺ ions outside the cell and a high amount of K⁺ ions inside the cell. This difference maintains the membrane potential at -70mv.
When a stimulus activates a cell receptor, it causes the opening of the sodium channels in response to either mechanical stimulus or neurotransmitter released due to stimulus. The opening of the sodium channels leads to the influx of Na⁺ ions which changes the potential from -70 mv to more positive value. When this change in membrane potential reaches - 55 mv it leads to the opening of the voltage-gated channels which causes an influx of Na⁺ ions. This more influx of Na⁺ ions leads to depolarization when the membrane reaches above the threshold and the action potential is generated in the neuron.
