Density-dependent inhibition is a phenomenon in which crowded cells stop dividing at some optimal density and location. This phe
nomenon involves the binding of a cell-surface protein to its counterpart on an adjoining cell's surface. A growth-inhibiting signal is sent to both cells, preventing them from dividing. Certain external physical factors can affect this inhibition mechanism. True or false?
Different substances such as growth factors and nutrients affect the mechanism of density-dependent inhibition of growth as cells become more and more numerous
Isotopes are variants of a particular chemical element which differ in neutron number (neutral particle)and all isotopes of a given element have the same number of protons (positive particle) in each atom.So isotope B of the sodium will have 11 protons, 11 electrons but it may have a wide range in its number of neutrons.
The answer is B. While some animals' colors and coat thicknesses change with the seasons, this has more to do with reacting to the change in seasons than with genetics.
Some bacteria and fungus actually directly feed plants in exchange for food the plant provides. Fungus can even extend the roots of the plants, growing from the tips out, further into the soil helping the plant find more water and nutrients.
