Please ask for the 50 basic concepts in the sophomore biology book!!

Why are there hundreds of different species of butterflies instead of just one butterfly? My understanding is that "butterflies" are a general way of survival, and there are many people around the world who adopt the "butterfly" way of survival, but due to different environments, different species of butterflies are left behind. So there are hundreds of different species of butterflies, even in one place, there are different species, and that's because they can all adapt to the environment and so they are preserved.

The same goes for animals, plants, and fungi. Like animals, they can survive both terrestrial and aquatic, but in general, they all adopt the "animal" way of survival. The same goes for plants and fungi, what else is there to do?

First, a genetic mutation occurs in the species, and multiple phenotypes (traits) appear in the same species. For example, a different pattern, or one less eye, etc.). Second, the environment selects these phenotypes, such as eliminating some that are not suitable for the environment (for example, one less eye is not very suitable for the environment), leaving the environment (the butterfly pattern does not have much impact on survival, if they are all more "mimic", so that a variety of butterflies are left).

Although these stays are not very different from each other, they live in harmony and do not compete too much, so they constitute our colorful nature. You can put plants, animals and fungi in it.

CA Both rats and ants eat seeds.

b。All the rats migrated away, and the ants lacked competition, first increasing, then stabilizing, and then decreasing. Ants all migrate, ants like to eat small seeds, and the population of small seed plants must have risen first.

d。Various ecological factors interact, there is a direct and indirect connection between living things, and rightly, plants and animals interact with each other.

Answer: A, the fluidity of the biofilm depends on the phospholipid molecules and protein molecules that make up the cell membrane, most of which can be motile and have nothing to do with the formation of lysosomes; b. Lysosomes must be highly stable in living cells because they contain a variety of different hydrolytic enzymes. The non-decomposition of lysosomes is related to the structural composition of its membrane, which contains high cholesterol, which promotes the stability of membrane structure. c, the essence of most enzymes is proteins, and proteins are synthesized in ribosomes; d, the enzyme has a mild type (i.e., it needs to be at a suitable temperature and pH to have enzyme activity), so the enzyme in the lysosomal will be inactivated when it enters the cytoplasm. Hope!

The key to doing this question is to understand the hierarchy of living systems and then look at the school. First of all, we will understand the composition of living systems, such as cells, tissues, organ systems, individuals, populations, communities, ecosystems, and biospheres, and then understand the composition of schools. Each student forms a class, and then each class forms a grade, and students from different grades can form different departments together, and the whole school is formed between departments.

Of course, if you're in junior high school or high school, there are no faculties, there is a teaching office that manages the grades, and you manage the logistics of the school. Organize a school in this way. If you want to analyze the benefits of various things from a systematic perspective, I think the benefits are as follows:

1) In the system, we can find our own position, so as to give full play to our current capabilities. (2) As a simple organism, we can analyze the whole system from the point of view of the system, based on the performance of a single individual, and (3) from the perspective of the system, we can talk about a complex system for simple analysis. Good luck with your studies!

Item A: IAA has a duality in increasing membrane permeability. Duplexity means that a moderate concentration of auxin can promote increased membrane permeability, but excessive amounts can inhibit membrane permeability.

There is no such meaning in the figure, you can look at the curve below, it first rises and then falls and then rises sharply, and it does not say that the increase in concentration will inhibit the permeability of the plant.

Item B: If the word is not removed in the question, then B is correct, because at low concentrations of auxin, the change in the curve is relatively weak, so the effect is not significant.