Biology questions in junior high school are 50 points if they are urgent

1T cells, interleukin, phagocytic cells. 3b A complete reflection arc does not necessarily require a reflection. 4. Hyperglycemia A is developmental.

There is no need. I won't take such a difficult question.

I only took the biogeography high school entrance examination last year.

Very simple. The average grade score is and.

1.Mode of transmission. The source of infection is the healing organism on the unclean cockle.

2. (1) There is no true nucleus. (2) Cut off the route of transmission. (3) Antibodies. Specificity. No, artificial immunization should be considered an immunization method.

3.Natural immunity is divided into specific and non-specific immunity. Specific immunity is mainly based on lymphocytes, and non-specific immunity is mainly based on white blood cells.

1: The source of infection.

The main difference between the source of infection and the route of transmission is the different word, 'source' is the source, and 'pathway' is a process].

2 (1) E. coli has or without a formed nucleus.

(2) Cut off the route of transmission.

3) Antigen specificity [No, this is to remember!!] 3. Natural immunity is not a specific immunity

I'm a high school student but very interested in biology. I have done "Biology Law Guidance" in the class, I hope it can help you!

1 False The bile secreted by the gallbladder is digestive juices, but there are no digestive enzymes.

2 Wrong The large intestine of a person can also absorb a part of water and inorganic salts.

3 False: Pancreatic juice and intestinal juice are not.

4 Wrong The appendix is in the right lower abdomen of a person.

5 pairs. 6 False The digestion of starch is related to the chewing of the teeth and the stirring of the tongue.

7 False There are no villous bulges on the surface of the large intestine.

1 Yes. 2 No.

3 False. 4 Lower right part.

5 Yes. 6 False.

7 False.

Hemoglobin, oxygen-carrying hemoglobin, (theoretical knowledge).

Carbon dioxide molecules are transported in the form of molecules. (Theoretical knowledge).

There are nose hairs, mucus, and capillaries (theoretical knowledge).

carbon, hydrogen), may not contain oxygen. (It doesn't have to be oxygen.) Because combustion in the air is a reaction with oxygen in the air.

The oxygen generated may come from air and not necessarily from chemical compounds. But the hydrogen element in the air does not participate in the combustion reaction. And the amount of hydrogen in the air is not large. ）

After oxygen enters the bloodstream, most of it, it enters red blood cells, where it binds to hemoglobin to form oxygen and hemoglobin.

After carbon dioxide enters the bloodstream, most of it is transported in the form of C02.

Structural characteristics of the nasal cavity adapted to breathing:1If there are nasal hairs and nasal mucosa in the front of the nasal cavity that burn in the air and produce water and carbon dioxide, then the correct statement about the composition of this compound is that it definitely contains elements C and H, and may (or not) contain element O.

b Parasitism and saprophytic.

There is mold on shiitake mushrooms, which are parasitic because molds absorb nutrients from living cells.

There is mold growing on the medium of shiitake mushrooms, which is a mold that absorbs nutrients from dead cells and belongs to saprophytic.

Select b Analysis:

There is mold on shiitake mushrooms:

Shiitake mushrooms belong to macrofungi, and the molds that grow on them belong to filamentous fungi. Shiitake mushrooms absorb nutrients in the culture medium to live, while molds directly absorb the nutrients of shiitake mushrooms to live, so molds are parasitic on shiitake mushrooms. It is an interspecific relationship.

Mold grows on the medium where shiitake mushrooms are grown:

The culture medium belongs to organic matter (decaying plants and humus), and molds directly absorb the putrid organic matter in it for food, so it belongs to saprophytic.

The answer is analysis B: shiitake mushrooms are living organisms, and molds grow on shiitake mushrooms and absorb nutrients from shiitake mushrooms to survive; On the other hand, metrydew grows on the medium and has direct nutrients, so it is saprophytic.