Homo sapiens.

Ten days later, Bai Yulou, Simon and his party had adapted to the gravity of Venus.

At the same time, they found out the basic situation of residential areas, agricultural areas, industrial areas, mining areas and storage areas.

With their arrival, a large number of scientific research cabins that had been attached to the agricultural area before were also re-divided to form a separate scientific research area.

Bai Yulou and others, who were officially working, came to a laboratory with a very high level of protection—the Venus Biological Laboratory.

This "Venus biological laboratory" studies the local creatures of Venus.

In the cultivation room in the laboratory, Bai Yulou saw the first Venusian organism - nitrogen algae.

Nitrogenous algae are only the size of a fingertip, translucent colloid, and have a large number of nitrogen air pockets in the body, which can float in the sky with the help of nitrogen buoyancy.

The reason why it is named nitrogen algae is that there are chlorophyll organisms similar to algae in these organisms. They absorb carbon dioxide and some free water molecules and use photosynthesis to synthesize organic matter.

In the atmospheric ecosystem of Venus, a total of 37 species of nitrogen algae have been found, and they live in the atmosphere 30-50 kilometers from the surface.

In addition to nitrogen algae, there are also air jellyfish that feed on nitrogen algae, and more than a dozen microorganisms that live in air jellyfish.

This is the ecosystem of Venus' atmosphere, a very tenacious and very fragile ecosystem.

If it weren't for the arrival of Homo sapiens, they might not be discovered by humans until decades later.

In fact, Homo sapiens has long been familiar with the existence of life on other planets.

The moon has an underground biosphere, Mars also has an underground biosphere, and Venus has an atmospheric biosphere. These are all very normal things.

We cannot deny other planets with the standard of the earth's ecological circle, because life has infinite possibilities.

The earth and the earth's creatures are actually the result of a two-way rush.

It is not the environment of the earth that creates the living things. During the whole process, the living things are constantly affecting and adjusting the earth.

For example, cyanobacteria billions of years ago, their family absorbed carbon dioxide and released oxygen, which directly killed most of the anaerobic bacteria, and caused the earth to undergo a major oxidation event. Iron oxide and copper oxide on the earth today Such minerals are the result of the Great Oxidation Event.

The gradual increase in the proportion of oxygen in the atmosphere also caused the earth to begin to cool down, and there was an obvious alternation of cold and heat.

If the earth did not give birth to cyanobacteria in time, then Venus may be a lesson for the earth.

Of course, Venus's carbon dioxide concentration has exploded, but it doesn't mean that creatures cannot be born. For example, there is a layer of interlayer that is more suitable for creatures in the high altitude of the atmosphere.

Nitrogenous algae, air jellyfish and the like were born in this environment.

In this biological cultivation room on Venus, you can see nitrogen algae floating in the wind. They have been studied by many researchers. Synchronous robots are so convenient that people don’t need to come to Venus in person, and research can be carried out remotely.

Bai Yulou opened the biological tablet, inserted it into the database of the laboratory, and then he found many related research reports.

Some study nitrogen algae organelles, some study reproduction, and some study special compounds.

Among them, the research on how nitrogen algae resist radiation is the most popular among all research directions, because the magnetic field of Venus is so weak that it cannot block the solar wind at all.

The habitat of nitrogen algae is located in the altitude zone of 30-50 kilometers in the atmosphere, although the concentration of the atmosphere in this region is several times that of the earth's surface.

But there is no way to block ultraviolet rays and other high-energy rays. After all, there is no ozone layer in the atmosphere of Venus.

Therefore, in the face of such strong ultraviolet rays, high-energy rays, and high-energy particles, many researchers are very curious about how nitrogen algae survive in this environment.

Bai Yulou was also very curious. He carefully flipped through the relevant research reports.

It turns out that the appearance and composition of nitrogen algae are very strange, and the inner core is also very strange.

The colloidal layer on its surface is composed of dense sulfur compounds, which are made of sulfur dioxide in the atmosphere of Venus, which can effectively block harmful cosmic rays and high-energy particles, and only allow a part of the available sunlight to enter the core.

Similarly, the inner core of nitrogen algae is wrapped in nitrogen, and the inner core is divided into photosynthetic inner core and the most important reproductive inner core.

"Huh? This thing actually has a strong ability to repair genes?" Bai Yulou read a very interesting research report.

According to different types, the reproductive kernel of nitrogen algae can be divided into male and female. That is to say, nitrogen algae has sex.

When they reproduce, it is also very simple. The neutral skin of the male nitrogen algae will gradually become positively charged, while the neutral skin of the male and female nitrogen algae will become negatively charged, and then attract and pair with each other.

This is a general skill of the nitrogen algae family.

Obviously, this is a reproduction method tailored to local conditions. After all, this is not the earth. Nitrogenous algae do not have enough resources, and they cannot just spray their daughters in the atmosphere. Otherwise, cosmic rays and high-energy particles will kill most of the daughters, and cause Severe genetic mutation.

But that's not the most amazing thing.

The most amazing thing about nitrogen algae is that their male and female reproductive cells are the same type, and both male and female reproductive cells have 11 pairs of chromosomes intact.

When they enter the state of reproductive union, the male and female germ cells will fuse together, then form a diploid, and then complete the division to form a new haploid, that is, the birth of a daughter.

The daughter body builds its own nitrogen algae body between the male and female nitrogen algae, and the daughter body absorbs the nutrients of the mother body, but when the body grows to about one-twentieth of the mother body, it can break away from the mother body and become a brand new nitrogen algae.

Under normal circumstances, the nitrogen algae parent body can only reproduce 22 to 25 offspring, and then it will die completely.

And these nitrogen algae sporophytes can mature, less than one-tenth.

What Bai Yulou is more curious about is the coping mechanism of nitrogen algae to individuals with genetic mutations. Normally, the germ cells of nitrogen algae have relatively strong self-repair ability. If the gene damage is too serious, the mother will automatically trigger the self-eating mechanism, which will That part of the germ cells that have lost their reproductive value is digested.

This is an ability that humans do not currently have. To be precise, it is an ability that human men do not have. Human female germ cells have a certain self-repair ability, but male germ cells cannot repair themselves.

In order to solve the problem of genetic damage in male germ cells, Homo sapiens has also organized quite a few research topics, including drawing on the self-repair ability of female germ cells. Unfortunately, the huge difference between male and female germ cells has led to no way to solve it.

However, the reproduction mode of nitrogen algae now has certain reference significance for human beings.

Bai Yulou even discovered a blind spot.

That is "neutralization". Although the problem of men and women in the Homo sapiens company is not serious, there are still hidden dangers in the differences in the physiological structure of the two parties.

If one day in the future, men and women can reproduce without differences in physiological structure, then there will be no difference between men and women.

After all, there is no obvious individual difference between nitrogen algae. The reason why the germ cells of the two are divided into male and female is mainly to facilitate pairing and reproduction.

Under certain conditions, the sex of nitrogen algae can be transformed into each other.

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