The correct answer is diffusion.
Aquatic respiration refers to the procedure whereby an aquatic animal attains oxygen from water. Fish and other aquatic species utilize gills to consume oxygen dissolved in the water and diffuse carbon dioxide out of the bloodstream.
Diffusion is a procedure in which a substance moves from a region of high concentration to the region of low concentration until equilibrium is attained. In the case of aquatic species, blood with a low concentration of oxygen molecules moves through the gills. The concentration of the oxygen molecules in water is greater in comparison to the concentration of oxygen molecules in the gills.
As a consequence, the molecules of oxygen diffuse from water (higher concentration) to a region of lower concentration, that is blood. In the same manner, the molecules of carbon dioxide diffuse from the blood, that is, high concentration to water, that is, low concentration.
Semiconservative replication would produce two copies that each contained one of the original strands and one new strand. Conservative replication would leave the two original template DNA strands together in a double helix and would produce a copy composed of two new strands containing all of the new DNA base pairs.
B.The projections are pseudopodia, released for the locomotion of the paramecium.
C. A Material that consists of one or more cells is a living organism
Answer:
a) Density dependance
Explanation:
Density dependant factors are those factors that influence a population differently if the population is crowded than if it is not crowded.
For example :
- A disease spreads more rapidly through a crowded population than through a sparse one.
- A loss of food source affects a crowded population severely since there is less food to go around.
These factors include :
- Stress
- Predation
- Emigration
- Limiting sources
- Infectious diseases
Hence according to the given scenario, the survivorship of gobies and the fecundity of sparrows, both decline at high population densities , so this phenomena is density dependance.
