Urgent high school biology exam questions I want to explain the reasons in detail!! Thanksgiving

B. Autotrophic theory is the ability to produce organic matter from inorganic matter, such as plants (photosynthesis) and nitrifying bacteria (chemosynthesis).

Heterotrophic popular point is to eat other people's (- hehe,) because you can't absorb the essence of heaven and earth to turn into organic matter, only eat grass, eat meat, eat fruit ......

By the way, I hope it helps you.

The autotrophs (plants, cyanobacteria, nitrifying bacteria, photosynthetic bacteria, sponges, black algae) required by high school biology are all autotrophic in addition to the above

B heterotrophic type: It refers to the type of metabolism that cannot synthesize organic matter by itself, but relies on the oxidative decomposition of ready-made organic matter and the energy released by oxidizing ready-made organic matter to maintain its own life activities.

Autotrophic type: refers to the metabolic type in which the vast majority of green plants and a few species of bacteria use light energy or chemical energy as energy, and carbon dioxide in the environment as the carbon source to synthesize organic matter and store energy.

This is the fundamental difference, just remember it.

b Whether organic matter can be produced directly from inorganic matter.

Autotrophic organisms are organisms that directly use inorganic matter to produce organic matter through photosynthesis or chemosynthesis.

Heterotrophic organisms are organisms that can only use the organic matter of other organisms and transform them into their own organic matter.

The biology exam is very easy, and you can read a little bit of biology books and get a pass.

b...Autotrophic, typically with green plants, photosynthesis.

b The fundamental difference between autotrophic and heterotrophic is the ability to use inorganic matter to make organic matter, which is written in textbooks.

Option 1 B, the target cell contains antigen, so A is not right, the target cell lysis only releases the antigen, and the target cell is in contact with the effector T cell, not the effector B cell.

2 QuestionIn a cold environment, in order to maintain a constant body temperature, a large amount of calories must be consumed, so aerobic respiration should be accelerated, that is, oxygen consumption will increase.

3. Question B, the concentrations of Filin reagent solution A and B are different from the diuret reagent, Filin reagent solution A and solution B are added together, and the diuret reagent A and B solution for identifying proteins should be added separately

1.Pick B

a.Not necessarily. Some antigens do not enter the target cell and are only present in the internal environment.

b.It would be better to change "pathogen" to "antigen". Because pathogens are microorganisms that cause illness in the body.

The body's own senescent cells and cancer cells (alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA) appear on the surface of the cells, which become target cells and can be eliminated by the immune system.

c.After the target cell is lysed, the antigen is released, and the antibody binds to the antigen to form an antigen-antibody conjugate, which is finally engulfed by phagocytic cells.

d.Effector B cells secrete specific antibodies, which then bind to the antigen. Effector T cells do not die at the same time when they attack the target cells. There is no simultaneous death of target cells and effector B cells.

2.Enlarge. In a low-temperature environment, in order to maintain the homeostasis of its own body temperature, the body's metabolic activity is enhanced, and oxygen consumption increases, thus producing more heat. This is a trait common to homeothermic animals.

3.I choose ぐWhen the B solution for the identification of reducing sugar is CuSO4 and the B solution for the identification of protein is too high, the blue Cu2+ will mask the purple color of the reaction.

b.Due to the small size of the fat droplets, a microscope is required for better identification of the material.

c.When identifying soluble reducing sugars, liquid A and solution B should be mixed evenly, and then added to the test tube containing the sample (must be prepared and used), and 50 65 water bath heating.

d.When identifying proteins, NaOH (solution A) should be added to create an alkaline environment, and then CuSO4 (solution B) should be added.

a cerebral cortex is involved b 2 on the same reflex arc d different one hearing one taste do you say it would be the same.

Replicate three times to become 2 3 = 8 DNA molecules, each of which is the same as the parent strand, a 2-m t, so multiply by 7.

Golgi apparatus.

The plant needs to resynthesize the cell wall, and the cell wall is synthesized by the Golgi apparatus, so at this time, the Golgi metabolism is very vigorous, and there is the most C14. Pick B

It should be the Golgi apparatus, which is associated with the formation of polysaccharides, the use of glucose.

It should be C, and only C is related to the synthesis of sugars.

B, The Golgi apparatus is the organelle that forms the cell wall.

First of all, a population is all the individuals of a species in an area, and the main point to remember is that a certain area, a species, all individuals, only option c is met.

First of all, rice and aquatic plants are two species, so a mistake.

There are many kinds of fish in the pond, so B is not right, and there are many kinds of fungi on rotten wood, so D is also wrong.

And c a cotton field is a certain area, and young aphids, winged and wingless mature aphids are all the individuals of this group of aphids, so c is correct.

Population refers to the sum of all individuals of the same species living in the same natural area, and it can be seen that c is barely compliant. A should be considered a community, B has many species of fish, and D has many kinds of fungi. Why is item C reluctant, because can all the young aphids, winged and wingless mature aphids in a cotton field, include all individuals?

What about the old and not dead? Another is that a cotton field should be very large, and aphids live in clusters, and I personally think that all the aphids on a cotton plant are more in line with the definition of a population.