How easy it is to creature in the second year of junior high school!! Urgent

The difficulty of biology in junior high school is not very high, so I should read more and think more and remember more, do more when doing experiments, combine the knowledge I have learned, and carefully complete the experiment report. The whole junior high school biology is relatively simple, but for the beginning.

For students in the first and second years of junior high school, it is difficult to understand without a certain basic knowledge of physics, chemistry and some natural sciences, but it will not increase the difficulty in teaching, and only requires understanding, understanding and description.

Biology in junior high school is very simple, it is not difficult to get a score, you just need to remember the knowledge points taught by the teacher, there will be no difficult questions, I just finished the biology exam.

Generally speaking, the teacher should always hand out the test paper before the final exam, or explain the key and difficult points of the exam, you just need to memorize it, of course, if you want to take the major, it is a different matter. Come on!! o( o haha

It's very simple, to be honest, you can not listen to the class, when you get to the exam, the teacher will send a lot of handouts, whether it is a good grade or a bad grade, at that time, it is all back, so you just need to memorize it carefully at that time, you will pass the test, and the exam is super simple, I was in the back when I was backing, I didn't understand why this is this, but it still passed and it only took 20 minutes to complete the biogeography or a file during the exam, believe me to memorize it seriously.

It's not very difficult, you can memorize more, and when you do experiments, you can do more hands-on, combine what you have learned, and carefully complete the experiment report. It's simple! Even at that time, I was a representative of the biology class! Ha.

It's simple, you read the book carefully several times, pay attention to the details, and make up the important words in the book into fill-in-the-blank questions, which is very effective to do before the exam, (to do it yourself).

It's very simple, I am a sophomore junior high school student, and I scored 79 out of 80 points in the primary and secondary school entrance examination

The biogeography of junior high school is very simple, and the knowledge points are very simple.

The microscope is equipped with two types of objective lenses, and the high-magnification lens is generally used to see the cells, so that the details of blood flow cannot be seen.

(1) Superphosphate. For the growth of peanuts, potassium chloride is a single potassium fertilizer, and then plants are allergic to chloride ions and must not be used; Ammonium bicarbonate is a nitrogen fertilizer. Superphosphate contains phosphorus and calcium multi-element fertilizers2

Take mulching measures 3 When transplanting, try to bring soil and remove part of the branches and leaves, choose to transplant in the evening or rainy days4 Watering more 5 Increase the air of the soil, which is conducive to the respiration of the roots, and at the same time, you can also hoe weeds to prevent weeds from competing for water Li Bi and sunlight 6 "reach the top" or remove the top buds on the main stem in time 7 Make the cambium layer of the pumpkin and the cambium of the watermelon dense together (1) Type disturbance 2) Photoreceptor cells on the retina (3) Vision and somatic movement (4) Conditioned reflexes.

The increase in the BC segment in 1c is due to the fact that the organic matter does not increase when the seeds germinate first, and the organic matter does not increase until the leaves are grown.

2c Urine is formed after the original urine passes through the renal tubules, most of the water is reabsorbed, and the concentration of urea should increase.

C BC segment seed germination absorbs water, but organic matter does not increase.

2.c When the original urine passes through the renal tubules, the reabsorption of water through the renal tubules is reduced, so the urea concentration should be increased.

c Seeds need to consume organic matter to provide energy in the early stage of germination The total amount of organic matter decreases c After the original urine passes through the renal tubules, the water in the urine is reabsorbed, and the urea concentration should increase.

I think the answer to the first question should be C. Because the seed germination of the BC segment absorbs more water, the fresh weight will increase. Seed germination requires the consumption of organic matter, which should be reduced, not increased. So the C answer is incorrect. Therefore, C should be chosen.

For the second question, you should choose C. Because Figure C reflects the change of urea after the original urine passes through the renal tubules. The renal tubules reabsorb most of the water in the original urine, some of the inorganic salts, and all of the glucose and send them back to the bloodstream.

The concentration of urea in the urine remaining in the tubules should increase, not decrease. So the C answer is inaccurate. Therefore, C should be chosen.

(1) A seeds cannot photosynthesize before germination, produce organic matter, and can only consume the original energy in the seeds, so the seed mass of the OA segment decreases.

2) c After the original urine passes through the renal tubules, the urea concentration will decrease within a certain range and will not drop to zero.

: The evolution of living things is generally a process, from simple to complex, from aquatic to terrestrial, from low to high.

The survival of the fittest is the result and is achieved through the struggle for survival, so the struggle for survival is the driving force of biological evolution.

The late occurrence of strata means that A occurred earlier than B, but A did not necessarily evolve from B, as if humans evolved later than mammoths, but humans did not evolve from mammoths. It can only be said that A is higher than B, just as humans are higher than mammoths. The higher the biological structure, the more complex it is.

If there is only heredity and no variation, living things will remain the same and it will be impossible to evolve. Heredity is the basis of variation, and there is no way to talk about variation without heredity.

In addition, I feel that the survival of organisms that adapt to the environment in option D is the result of evolution, not the motivation of evolution. Cause and effect are reversed.