Dependent. Density dependent factors is what is being described.
A cell membrane is c.selectively permeable because it regulates what materials enter the cell.
Explanation:
Most diving birds have (relatively) long necks and shorts legs, although their necks aren't as long as say herons, storks or egrets. Take the common loon for instance. Their necks can be up to half as long as their bodies but their legs are so short and set so far back that they are very awkward on land.
Ans: Cancer is the result of unchecked cell division caused by a breakdown of the mechanisms regulating the cell cycle. The loss of control begins with a change in the DNA sequence of a gene that codes for one of the regulatory molecules.
The sentence could be as simple as a definition! Tidal range is the vertical difference between high tide and low tide.
