Biological Basis Questions, What are the Fundamental Questions of Biology?

Bacteria belong to prokaryotes, and their genetic material is DNA, 1 false; The genetic material of an organism with a cellular structure is DNA, and the genetic material of a non-cellular organism – a virus is DNA or RNA, 2 correct;

Lactic acid bacteria belong to prokaryotes, yeasts belong to eukaryotes, and the two have the only organelle in common, ribosomes, and the genetic material is DNA, 4 correct;

The embryonic cells of the seeds are immature plant cells, which do not have large vacuoles and cannot be separated and restored to the plasma wall.

The genetic material of bacteria is only DNA and not mainly DNA. As long as it is not a virus, the genetic material is all DNA. So 1 is wrong, 2 is right.

Prokaryotes only have ribosomes, an organelle, and they do not have endoplasmic reticulum, so they live well. 3 False.

1 and 2 are both right.

3 False and 4 True. Seed embryonic cells should not be able to have plasma wall separation, because there are two conditions for the phenomenon of plasma wall separation, one is to have a cell wall, and the other is to have a large vacuole. There do not appear to be large vacuoles in the embryonic cells.

1. Bacteria are prokaryotes, and the genetic material is DNA, and the genetic material of organisms with DNA structure must be DNA;

Compared with the 3 pairs, lactic acid bacteria and yeast have ribosomes and the genetic material is DNA;

3.The embryo does not have large leaf vesicles, so there is no plasmo-wall separation.

2, 4, no.

1 Wrong, all genetic material is DNA.

3. Prokaryotes do not have built-in nets.

The embryo does not have large vacuoles, no.

Except that "only cells containing endoplasmic reticulum can be synthesized organically" is true.

1. Biology has a very close relationship with many aspects of human life. Biology, as a basic science, has traditionally been the foundation of agronomy and medicine, involving cropping, animal husbandry, fishery, medicine, pharmaceuticals, health and so on. With the continuous development of biological theories and methods, its application fields are constantly expanding.

The influence of biology has gone beyond the traditional fields mentioned above and extended to food, chemical industry, environmental protection, energy and metallurgical industries, and so on.

2. Closely related to the population problem is the food problem. Food insecurity is a serious problem that has not been addressed in developing countries for a long time, with hundreds of millions of people in the world currently suffering from malnutrition. In the past, biology has made a huge contribution to the development of scientific agriculture and the "Green Revolution".

Today, it is no longer an unrealistic reverie for human beings to orientally modify plants within a certain limit and use genetic engineering and cell engineering to breed excellent varieties with high quality, high yield, drought resistance, cold resistance, waterlogging resistance, salinity-alkali resistance, and resistance to diseases and insect pests.

3. The world's chemical energy reserves (oil, coal, etc.) are always limited and will be depleted one day. As a result, renewable biological resources (biomass) in nature are once again being valued. Most of the biomass in nature is cellulose, hemicellulose, lignin.

By combining chemical, physical and biological methods, cellulose can be converted into alcohol, which can be used as an energy source.

It is not possible to drink a lot of water before donating blood because the fluid will affect the viscosity of the blood.

The purpose of washing both arms before blood collection is to prevent infection during blood collection.

Why do you need to do blood typing before donating blood: determine the purpose of the blood, which patients can be transfused to.

1Water will be absorbed quickly and enter the bloodstream, and if you drink a lot of water, the blood concentration will decrease in a short period of time, affecting the quality.

To prevent the spread of epidemics, such as hepatitis and AIDS, for your sake, and others must have a physical examination before blood transfusion.

b.Wash your arms before blood collection to prevent wound infection, including disinfection during blood collection.

3. Blood donation is for blood transfusion to others, and each person's blood type may be different, and there are four types of blood types: A, B, AB, and O.

Test the blood type of the donor before donating blood to better match the blood type.

1 All Ren brothers, you are too ruthless, so much!! Hehe, I said bad things about you, I hope it doesn't affect your judgment)

1.Apparently b. The renal tubules absorb NA from low concentration to high concentration, which consumes energy and requires carriers, which is active transportation. A is passive, C is oxygen, CO2, etc., and can diffuse freely. d Same as c.

2.Oh, you need to understand the general direction of this. Water, lipophilic (cell membranes are phospholipids), ethanol, and gases are generally freely diffused.

Amino acids, etc., have passive transport, which requires a difference in concentration. Ions are generally actively transported, and generally reverse the concentration difference. The Proposal c.

They are all lipophilic substances.

3.This means that it affects energy, and what is related to energy is active transportation. Therefore, what is not affected is b, which is all free spread.

This suggests that iodide ions are inverse concentrations and belong to active transport. It requires a carrier and energy, and has nothing to do with seawater iodine.

Refer to question 2.

Free diffusion does not require a carrier, while active and passive transport requires a carrier, which belongs to proteins, and in order to destroy, proteases are needed.

Even if the concentration is high, it can generally cause plasma wall separation, and without plasma wall separation, there may be no cell wall. d inactivates the cells. The treatment of clean water does not have much effect, and the treatment has already been separated.

The cell wall is absent after treatment because the cell wall (plant) is made up of cellulose.

8.(1) Correct (2) False (3) Correct ; Because of the phenomenon of plasma wall separation, the vacuole gradually becomes smaller, and the color changes from light to dark, and the protoplasm layer is gradually separated from the cell wall to form spherical clusters. (4) The membrane structure cannot be seen under the light microscope (5) Correct, the cell wall has holes Select d answer. You got the question wrong, two Bs.

Hope it works for you.

1 Prokaryotes have no chromosomes.

2 Nuclear inheritance is equivalent to obeying Bridge-branched Mendelian inheritance, since orthogonal and inverse crosses are involved, it means that it is a plant, so the phenotype of F1 is always the same is right. Also, nuclear inheritance and protogenetic inheritance are not the same. Plastein inheritance means that the F1 generation is the same as the mother; The genetics of the spotted branches is a special case, and it may involve other aspects of heredity, which will not be tested in the college entrance examination, and even if the spotted branches have different colors, it is because of the random combination of chromatids, in line with Mendel's law.

3 I didn't understand, I'm sorry!

First of all, what does a 'normal seed' mean?

Answer; Evenoid seeds are considered normal seeds.

Triploid watermelons are originally triploid cells, so it can only be that one of the three chromosomes did not join at the time of union, so that diploid and diploid gametes can be formed, and then diploid and tetraploid seeds can be formed.

Of course, it is also possible to form a 6ploid seed, but the probability is even lower, it may be that an empty nuclear cell is formed during the union, and then a triploid gamete is formed, and then a 6ploid seed is formed.