Among them, the J-shaped growth curve is a growth model reflected by the internal growth rate (that is, under the experimental conditions, the population is not limited by any external environment, and there will be no necessary nutritional living conditions and no natural enemies); J type is divided into two types: ⑴ discrete exponential growth ⑴ continuous exponential growth.
? If the generations of the population do not overlap, such as many annual plants and insects, the population growth is discontinuous, which is called discrete growth and is generally described by difference equation. If the generations of populations overlap with each other, such as humans and most mammals, the population growth is continuous and can be described by differential equations.
? In other words, the knowledge you are asking is actually saying that only annual plants or insects that reproduce once a year will have discrete growth patterns, because only the generations of these two creatures (the individual development cycle of insects from leaving their mother eggs to adult maturity and laying eggs) are called generations. ) is non-overlapping, that is, discontinuous, discontinuous is discrete. The concepts of discreteness and continuity will be involved in college advanced mathematics.
3. Contrary to the former, S-type growth exists under natural conditions with limited resources and many natural enemies, so the concept of K value will appear under the restriction of restrictive conditions. Therefore, the S-shaped curve is a growth curve closer to the natural reality.
I hope my answer can help you, and I wish you progress in your studies ~