Creature, how could a be wrong? Immediately, the biology question explains why it is a

The People's Education Edition of the "Biology" (elective) textbook for the third year of high school"Human body temperature and its regulation"It is mentioned in one section: In a cold environment, the heat dissipation of ** is reduced, the metabolic activity is enhanced, and the heat production is increased. In a hot environment, the amount of heat dissipation increases (but there is no mention of a decrease in heat production).

So in a hot environment, the ratio of heat production and heat dissipation does not necessarily become smaller... For example, when a person is invaded by bacteria, the body temperature rises, heat production increases, and the heat dissipation reaches the maximum, and this ratio is not necessarily small, no matter in hot conditions.

The reason for the error is that the ratios should be equal!

Explanation: In summer, the ambient temperature is high, the metabolism is accelerated, and the heat generated is more, and in order to maintain the body temperature constantly, there is also more heat dissipation;

In winter, the ambient temperature is low, the metabolism slows down, and the heat generated is less, so in order to maintain the body temperature constantly, there is less heat dissipation!

If the heat production and heat dissipation are unbalanced in the hot environment (for example, the air conditioner is too cold at night, and the heat dissipation is more than the heat production, it will catch a cold), and the heat production and heat dissipation balance in the cold environment should be balanced (if the heat production is always more than the heat dissipation, then the body temperature will always rise instead of 37 degrees), so the A of this question should be wrong, and the ratio of the two cases should be comparable.

In summer, the body produces high heat, and when the temperature inside and outside the body is constant, there will be no heat transfer, but if the temperature outside the body is too high, not only the heat inside the body cannot be dissipated, but the heat from the outside will also be transferred to the body. The same is true for cold environments.

In summer, the weather is hot, so there is no need for too much heat production, so heat production, heat dissipation, and cold in winter, although there are thick clothes, it will be cold, so heat production, heat dissipation, and the above ratio

In summer, you need to sweat to dissipate more heat, and in winter, you need to sweat less and dissipate less heat.

In a hot environment, metabolism strengthens heat production and increases heat dissipation. In cold environments, metabolism is weakened, heat production is reduced, and heat dissipation is reduced. The magnitude of the ratio between the two is unclear and cannot be compared.

aWater is divided into free water and crystalline water.

The more water, the more relative free water.

Free water, on the other hand, has a reaction to the strength of metabolic activity.

The more water, the more metabolic activity there is.

The more material is consumed, the less water is consumed.

Don't be fooled by accurate numbers, many questions nowadays are like this, given accurate numbers, it is confusing.

The photosynthetic rate is the rate at which the plant fixes carbon dioxide, and the amount of carbon dioxide absorbed by the plant is volume, and the unit is different, and the photosynthetic rate has to be the amount of carbon dioxide absorbed by the plant per unit area per unit time.

Because the absorption of carbon dioxide is only the net photosynthetic rate, in fact, there is still a part of carbon dioxide produced by the plant itself, and then used for photosynthesis, and this part is not counted, so the absorption of carbon dioxide cannot be used as the photosynthetic rate.

The amount of carbon dioxide absorbed represents the net light and the rateNet light and rate = true light and rate – respiration rate.

The amount of carbon dioxide released by plants in the dark is the rate of respiration;

2.The rate at which plants absorb carbon dioxide or release oxygen or accumulate glucose under light is the net photosynthetic rate.

3.The rate at which plants assimilate carbon dioxide or make oxygen or make glucose under light is the total photosynthetic rate.

Antidiuretic hormone effect: promotes the reabsorption of water by renal tubules and collecting ducts (thereby reducing the osmotic pressure of the internal environment). This is something to remember, and you will have to do this kind of question often in the future, and if you remember it, you don't need to ask others.

Therefore, when the osmotic pressure of the internal environment increases, the secretion of antidiuretic hormone increases; When osmotic pressure in the internal environment decreases, antidiuretic hormone secretion is of course reduced.

Hope it helps

Antidiuretic hormone is to reduce the amount of urine, that is, to reduce water loss, and the internal environment is the osmotic pressure of the extracellular environment that needs to reduce water or increase solutes, so it should be that antidiuretic hormone is reduced to make water elimination.

It seems that the osmotic pressure increases, the diuretic increases, and then the urination decreases, and the water balance is maintained.

Hello! If there is no thymus, then there are no T cells (not explained), and T cells play a presenting role, that is, presenting antigens to B lymphocytes and releasing lymphokines at the same time, so without T cells humoral immunity is not normal, A is wrong, you can ask if you don't understand! Hope to adopt, thank you!

T cells do not produce copies.

antibodies, but directly attack. Therefore, the immune function of T cells is called "cellular immunity". B cells work by producing antibodies. Antibodies are present in body fluids, so the immune function of B cells is called "humoral immunity".

Mature T cells perform cellular immune functions and regulate the growth and differentiation of other immune cells. That is, there is no t

b doesn't work either.

When studying human immune regulation, didn't it be said that the thymus gland is an important immune organ of the human body, and humoral immunity is a large aspect, which has a lot to do with the thymus and lymph nodes.

Just look at the process of "humoral immunity" in books, and T cells play a role in it.

At the M point (plants only have respiration), the site of ATP synthesis in plant mesophyll cells is the cytoplasmic matrix and mitochondria. (Incorrect).

If the greenhouse temperature is appropriately reduced, the n-point will shift to the right. (The respiration rate is equal to the photosynthetic rate) temperature affects enzyme activity. (Correct).

o, pay attention to the curve trend, regardless of carbon dioxide concentration, the photosynthetic rate is the same, so the influencing factor is light intensity. and not carbon dioxide concentration. (False).

At point p, the three curves continue to rise with the increase of light intensity, so the photosynthetic rate can be increased by supplementing the light appropriately. But plants can't take advantage of green light. Chloroplast pigments absorb blue-violet and red light.

At the q point, none of the three curves rise (the light intensity is the same), so the factor affecting the three curves is the carbon dioxide concentration, but the top curve of the graph is already a high carbon dioxide concentration, and the curve does not rise if the carbon dioxide is added.

The answer should be: a

Curve chart: one identification mark (the meaning of the vertical and horizontal coordinates), two bright points (see the meaning of the key points), three analysis lines (see the curve trend).

In 1, the M point only has respiration, and the place of ATP synthesis is the mitochondrial and cytoplasmic matrix 2, the light is n point, which means that photosynthesis is equal to respiration, and the temperature is reduced, and the respiration is reduced by a large amplitude, so at this time, the photosynthesis intensity is correspondingly equal to it, and the N point is shifted to the left.

3. There is also a limitation due to the low light intensity.

4. Plants absorb very little green light, if you supplement, white light, red light, blue violet light are better than green light5 is right.

False, when the temperature is lowered, the respiration is reduced under the same light, how can the n-point shift to the right?

Let's just say what I understand:

First of all, let's talk about the meaning of transformation: the process by which the target gene enters the recipient cell and maintains stability and expression in the recipient cell, which becomes transformation.

In this question, it can be simply understood as: the genes in the original mutant strain and the genes existing in the mutant strain X are "put together".

X was cultured with J or L, and all 7 gene segments were complete. J is missing a4a5 and a6, and l is missing a4a5a6a7, then it means that these genes are all present in x, otherwise they are "combined" together, and the 7 genes cannot be complete.

Therefore, it can be concluded that X is either lacking A1A2 or He Mu A3, so that its genes can be "complementary" to J and L to become complete.

X and K or M are cultured together, and all 7 genes are not complete, either one or that is missing. where k is missing a3a4, m is missing a1a2a3a4a5, then x must be a3

Otherwise, if X lacks A1 and M happens to have A1, the two co-culture genes are complete.

If X lacks A2, M happens to have A2, and the two are cultivated together.

So, if you want to be incomplete, X can only be missing A3

I hope you understand

a'Represents the second trophic level intake, and b is the assimilation amount.

The energy transfer efficiency of injecting the next trophic stage from jatropha is b a.

"Represents the intake of the second nutrient, the assimilation of B.

The next trophic level of energy transfer efficiency is injected from jatropha B A.

The energy transfer efficiency of injecting the next trophic level from jatropha is the assimilation amount of the next trophic level The assimilation amount of jatropha is b, and the assimilation amount of jatropha is a. So the transfer efficiency is b a

Although I don't understand biology, it's obvious that the molecule should be B, and A' also sent some to E.

The answer is:

A is false, the causes of evolution are biological variation, as well as natural selection, and it cannot all be caused by mutation;

b Correct, the essence of biological evolution is the change of gene frequencies in populations;

c False, this needs no explanation;

D false, the population is the basic unit of biological evolution, if an individual changes, but its genes do not spread in the group, cannot be passed on to the next generation, and the gene frequency of that group cannot be changed, so the population cannot evolve.

A Evolution is actually caused by changes in the environment, and you can take a closer look at the relationship between mutation and natural selection in the book.

Will the B pair C White Tiger adapt to the environment?

D mutation changes the individual, and evolution says the change of the entire population.

In this way, isn't there a chromosomal variation?

Mutations occur all the time, but often they produce individuals who cannot survive, and there is no evolution.

The change of the environment will cause some extinctions, and the remnants will be able to adapt to the new environment, and evolution will be born. The result of natural selection.

aEvolution is caused by changes in the environment, and organisms slowly evolve themselves as the environment changes. c. Variations in some organisms may be less suitable for the environment in the future. It's unfavorable variation. D mutation changes the individual, and evolution says the change of the entire population.