Can anyone help me sort out my high school biological history?!!

Make a hypothesis: the yeast is still alive.

Design experiment: make a temporary tablet, add a certain amount of Tysol blue dropwise, and observe it under a microscope, 2. Add a certain amount of Trysol blue dropwise on the tablet, and place the tablet for a period of time.

3. Adjust the microscope and place the loading on the microscope to observe the dyeing of yeast on the stage.

Results & **:

1. If all the yeast is blue, all the yeast will die;

2. If part of the yeast is blue and part is not stained, the yeast will partially die;

3. If the yeast is not stained, the yeast is not dead.

Hope it helps.

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.

1. This experiment proves that Darwin said that "the signal generated by the tip is unevenly distributed in the elongation zone, resulting in bending growth".

Darwin's experiment was carried out under one-sided light, and the Bayer experiment proved that Darwin was correct when he said that the direct cause of the curved growth was indeed "the uneven distribution of the signal generated by the tip in the elongation zone", and that the one-sided light was only an indirect factor. So choose A

2. Due to the different sensitivities of different organs of plants to auxin, point e only has no effect on the organs shown in the figure, but not necessarily on the whole plant. Therefore, item c is incorrect. The ground growth of horizontal plant roots is due to the high concentration of auxin near the ground, which inhibits growth, and the CF segment illustrates the function of auxin to inhibit growth.

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.

Experiment 1: ABB and ABB;

Experiment 2: ABB and ABB;

Experiment 3: ABB vs. AABB.

Analysis process: First, through experiment 3, it was learned that susceptibility was dominant and disease resistance was hidden. Then, according to experiment 1, it was concluded that the red seed coat was dominant.

Next, let's analyze it one-to-one

Taking the seed coat as an example, the red seed coat of the first offspring of the experiment is 3:1, so the genotype of the parents is BB and BB, and the offspring of the second experiment is the red seed coat

The white seed coat is 1:1, so the genotype of the parent is bb and bb, and the experimental three offspring are also red seed coats: white seed coat 1:

1, so the genotype of the parent is also bb and bb.

Another type of antipathy and susceptibility is also analysed in this way.

Because this gene is a companion x dominant gene, so.

In A, the parental genes are recessive, and the offspring will not get sick, and in B, because the female parent must have dominant genes, there may be recessive genes, and the x in the offspring male is as for the maternal parent, so it is possible to get sick.

The explanation in C is the same as in B.

The x of the male in the middle of D comes from the mother, and the mother does not get sick, so the mother is a recessive gene, and the offspring male will not get sick.