What is the internal environment of the three compulsory three people in high school biology

2.In a vegetative state, the normal reflexes and other activities can be completed, that is, the spinal cord is normal.

4.It is not known whether there is thyroid secretion.

6.Penicillin is an extrinsic effect, not the body's own immunity7Epinephrine does not promote liver glycogenolysis.

Analysis: The number of organisms can usually reflect the amount of energy of organisms, and there is a positive correlation between them under normal circumstances, so the number of organisms can often be used to represent the amount of energy. As can be seen from the title, the energy transfer efficiency between insects and insectivorous birds, and between insectivorous birds and eagles is only 20%, so as to achieve "at least" the energy required to maintain the survival of an eagle.

Therefore, at least 1500 insectivorous birds are required to maintain the survival of an eagle, and it can be calculated that at least 1500 70000 insects are required to maintain the survival of an eagle.

The title is a bit problematic.

If the data is okay, it should be.

The upstairs idea is correct, but I don't know, the landlord's title is 10%, how can 20% say?

Then the possible understanding is.

The question should be 20%, not 10%.

We've done that.

1) Decomposers, abiotic matter and energy.

2) One organism can feed on a variety of organisms.

3) Predation vs. Competition Predation.

4) Random sampling at multiple sample points, multiple measurements to find the average.

5) Producers fixed solar energy.

6) Respiration is lost in the form of heat energy.

Not exploited. Decomposer.

1.The method is suitable for estimating the population density of small animals in plants or soils.

For estimating animal population density, it is best to use the "marker recapture method".

2。Succession is the process by which a community is replaced by another community. There are two types: "primary succession" and "secondary succession". It is not the restoration of the original species.

Actually, you can look at biology books, which have the exact words in them.

Animals with a large range of activities such as surveyed birds are recaptured with markers.

Succession is the sequential process of the natural evolution of a community from one type to another in a certain area.

Take a good look at the biology compulsory three, the book talks about it in more detail than me, if you don't know how to ask the teacher, we pay the tuition, will you not ask who he asks.

The first sentence, the bird activity is strong, the flag recapture method is used, and the sample method is used to investigate the inactive activity, which is generally used to investigate the density of dicots, or a certain insect egg, the density of aphids on crop plants, and the density of jumping bugs.

In the second sentence, the definition of succession is the process of one community replacing another community over time, so the original sentence is wrong.

The first is that the sample method is suitable for population surveys that are relatively stable at a certain time: such as earthworms, insects, etc., birds are frequently moving animals, and there is no operability.

Birds in a confined space are re-caught with markers! Second, succession is another round of evolutionary process that begins again after the extinction of the original species.

I can't remember) It doesn't have to be a re-evolution of the original species! Hehe, I haven't touched a creature in three years! I hope it's right!

Are you from Jiangsu? Small college entrance examination? I hope others will add to the mistakes.

1.Birds can fly everywhere, and the population density cannot be measured by the sampling method, so it can only be re-harvested by the marker.

2.Succession is when a new community replaces the original, or there are no creatures in the area.

There were no creatures in this place, but now there are creatures, which is called primary succession;

The new community replaces the original community, which is called secondary succession.

Sentence 1: Investigate the population density of a bird in a forest The marker recapture method should be used because the bird has a large range, whereas the method is used to investigate the small range.

Second sentence: Succession is the substitution of one species for another.

These are all basic concepts, and you can know by reading books.

1. Flag recapture method, sample method is plant.

2. The essence of community succession is the change of dominant species.

The first is the flag recapture method, there are several successions, each is different, and not every one is a reply to the ** species.

There are three main parts of internal environmental homeostasis: temperature, osmotic pressure, pH temperature, needless to say, low fever and high fever are uncomfortable, and you should know that enzymes have the most suitable temperature, low temperature enzymes will be inactivated, high temperature to a certain extent will be completely inactivated, fever can not eat is also related to this.

What about osmotic pressure, if the osmotic pressure cannot be maintained, there will be problems with the exchange of nutrients between cells and the outside world, O2 and CO2, and the glomeruli also use osmotic pressure to control the amount of reabsorption

As for the pH, you should remember the taste of soreness after strenuous activity, in other words, acidity and alkali are corrosive, these things are stored in your body, how can it be better.

It is effective in maintaining the normal growth of cells.

Only when the temperature, pH, etc. are within the appropriate range, the enzyme can function normally.

The growth and change process of insect population under certain environmental conditions can be theoretically expressed by the logistic curve, which is called the growth of the Logic. In other words, the growth rate of each individual in the population is a linear function of the population size of the mountaineers, and the larger the population, the greater the inhibition of further growth.

The logistic equation describes the growth of a simple population in a finite resource space, and the logistic growth model is also known as the self-inhibition equation. The number of diseases (x) is expressed in terms of the prevalence or severity of disease in plant populations, and the maximum capacity k of the environment is set at 1 (100%), and the differential formula of the logistic model is:

dx／dt＝rx(1-x)

The growth of the organism is carried out according to the biological logic of the system, and this growth is a logical growth that is more in line with reality.

According to the title, we can know: group 2 is the control group; 1,3 are the experimental group.

Then, it can be seen from experiment 2 that the IAA concentrations of 1 and 2 are equal, and that the amount of organic matter allocated to the side buds is reduced (as can be seen from the 14C radiance) due to the removal of the apical bud

Then the IAA concentrations of 1 and 2 are equal within 8 hours; From the 24 and 32 hours of lateral bud growth, it can be seen that the concentration of 2 is greater than the IAA concentration of 3 during that time.

Combining the two experiments, it can be concluded that the auxin concentration will not change much within 8 hours, or that the growth will only be promoted by the allocation of organic matter.

In fact, in the first 8 hours of experimental group 3, the amount of concentration was unchanged, and only the growth promotion was promoted by organic matter allocation (or nutrient distribution).

Therefore, according to the above experimental conclusions and inferences, it can be seen that the concentration of control group 1 and control group 3 is equal.