Fragments of Literature on Biology 20

1. Regardless of whether an egg is fertilized or not, it is not a living organism. It is a kind of cell and derivative of multicellular organisms, because it does not have the ability to metabolize and inherit independently, so it is not a living organism, but it belongs to the object of life science research. The lotus seeds unearthed in Mawangdui have been carrying out weak life activities for more than 2,000 years.

The lotus seeds here do not belong to living beings, but they have the conditions to become living beings. Once it is in the right environment, it can still take root, blossom and bear fruit.

2. No living individual on earth is a single living organism. A person seems to be single, with independent behavior and thinking, but there are many other biological individuals or groups in and out of his body: for example, Chlamydia trachomatis in the eye, E. coli in the intestine.

There are many such organisms that exist in the body of each person, and some biological individuals can also change certain behaviors of the human body, and even affect the psychological processes of people, although there is no evidence of the effect on heredity, but in the evolution of many animals, it is estimated that these tiny organisms must have played a role to a greater or lesser extent. The human body is a biological hybrid, and the roundworms parasitic in the human intestine are also a biological hybrid, and there are many bacteria and viruses in its body at the same time, and there are also certain viruses in the body of Salmonella, and there may also be certain bacteriophages in the body of these viruses. So, a biological hybrid is a very complex group of organisms.

3. Human intelligence is not a single existence, and heredity will affect the level of intelligence. However, in the process of its development, due to different historical conditions and differences in the surrounding environment, everyone's ability may not be able to be fully developed, and the exertion of intelligence is also directly limited by the outside world.

On the balcony, it was found that the daffodils that had been "sleeping" for a year actually spit out some young shoots, green, so that people were pitiful and surprised.

I thought it was withering, but I was amazed at how tenacious it was. I have rarely praised all things in nature, but today I have changed my mind because I know so little about them, and because of my ignorance, I have missed many opportunities to cleanse my soul.

Indeed, it can be said that sometimes everything in nature is much more noble than the human mind.

D, the gene fragment is continuous, the mutation you said doesn't say what the position is, maybe AAC just determines an amino acid, or it is possible that A just forms a codon with the previous one. Therefore, it is impossible to know which amino acid is mutated into which amino acid, and it is not known whether it is harmful or beneficial. However, biology generally considers that the probability of natural mutation in a gene being harmful is generally greater than the probability of being beneficial.

Pick D. The simplest way to understand this is this: because it changes genes. If it doesn't manifest, then it's harmless. If it is manifested, it is harmful.

The biology documentary I watched.

It's all seen in the animal world.

A series that belongs to the animal world.

For example, follow Bell on an adventure.

There is also a couple.

They go on adventures.

in order to observe the processes of living organisms.

After I watched it.

I liked it even more.

Marine organisms refer to all kinds of organisms in the ocean, including marine animals, marine plants, microorganisms and viruses, among which marine animals include invertebrates and vertebrates. Invertebrates include a variety of snails and shellfish. Vertebrates include a variety of fish and large marine animals such as whales, sharks, etc.

Marine life is rich in easily digestible proteins and amino acids. The nutritional value of food protein mainly depends on the composition of amino acids, the marine fish, shellfish, shrimp, crab and other biological proteins are rich, rich in 9 kinds of amino acids necessary for the human body, especially the lysine content is much higher than that of plant food, and is easy to be absorbed by the human body.

There are many genetically related fragments in the DNA, we call these fragments the genes, and different genes quietly store different genetic information, that is to say, the different characteristics of organisms are controlled by different genes, and genes control the traits of organisms

So the answer is: traits.

American scientists have discovered the world's largest living organism. It is a giant fungus that grows in Michigan and is larger than the blue whales of the ocean and the giant redwoods of California. This fungus and its scientific name is "Cyclomyces bulbs", which is huge and foul-smelling.

According to the journal Nature and reports, it is a single giant fungus that covers an area of 38 acres, weighs about 100 tons, and is estimated to have survived for 1,500 to 10,000 years.

Scientists at the University of Queensland in Australia have discovered the world's smallest mysterious creature deep under the ocean in the western part of the country. The organism, which is smaller than bacteria, was found in sandstone dug out of the open sea by oil rigs at a depth of about kilometres below the seabed. It is called a billionth of a meter because they are so small that the unit of calculation is one billionth of a meter.

They are only 20 to 150 billionths of a billion meters long, smaller than cells, smaller than even the smallest known bacteria, and about the size of a virus. Since viruses need a host to reproduce, this billionth of a living thing will set a new record for the smallest size of living organisms on Earth.

Scientists have pointed out that the fluff of this tiny creature resembles mold and regenerates quickly. Repeated laboratory analyses have confirmed that they contain DNA that determines life and genes. The discovery of the world's smallest organisms at such depths of the ocean has led scientists to suspect that there may be an unknown world of microorganisms hidden deep below the surface, the total number of which may exceed that of all life on the surface.

Scientists at the University of Queensland in Australia have discovered the world's smallest mysterious creature deep under the ocean in the western part of the country. The organism, which is smaller than bacteria, was found in sandstone dug out of the open sea by oil rigs at a depth of about kilometres below the seabed. It is called a billionth of a meter because they are so small that the unit of calculation is one billionth of a meter.

They are only 20 to 150 billionths of a billion meters long, smaller than cells, smaller than even the smallest known bacteria, and about the size of a virus. Since viruses need a host to reproduce, this billionth of a living thing will set a new record for the smallest size of living organisms on Earth.

Scientists have pointed out that the fluff of this tiny creature resembles mold and regenerates quickly. Repeated laboratory analyses have confirmed that they contain DNA that determines life and genes. The discovery of the world's smallest organisms at such depths of the ocean has led scientists to suspect that there may be an unknown world of microorganisms hidden deep below the surface, the total number of which may exceed that of all life on the surface.

Start with a small thing as the starting point, slowly zoom in, focus on describing a certain scene, and do it in detail, echoing back and forth.

yes, so it's a lot of experimentation to find the fragment of the gene of interest from the results, and that's why it's a lot of work.

After sequencing, it has to be spliced, and after splicing, there is less such phenomenon, of course, no library can cover all genes.

There is a possibility of this, but there is still a screening step to obtain the target gene, which can be detected with single-stranded DNA to see if it binds to the target gene (principle: the principle of base complementarity pairing). It can also be tested at the individual level to see if the individual contains the trait expressed by the gene of interest.

Tell me the email I'll send you a doc document of more than sixty pages.