| 单词 | 种群 |
| 释义 | 种群 Every individual cell in the population has a grid position stored internally, so I don't have to search the grid or maintain an external hash when I want to find a cell's grid position. A parthenogenetic population is, by definition, all female and the result, give or take the odd mutation, is that a rotifer’s daughters are genetically identical to her. But the problem with all these studies is that they tracked specific genetic lineages, and not the entire genome and, hence, populations. But as all zoologists know, experiments can only tell you so much. Eventually, you have to look at natural populations. Or did our species do away with them? Although the male- like females have an overall lower birth rate than other females, they do still mate and reproduce, maintaining the mimicry in the damselfly population. If, despite that, it remained hidden until now, who knows what other species of human might also be out there? Another synthetic biology inspired malaria project aims to stop transmission of the disease at the level of its vectors by engineering a genetic system to establish itself in a mosquito population. State of the Birds report published last year by government and conservation organizations warned that bird species that have been in a steady decline now face added pressure from climate change. However, he's not fully convinced that this can happen within a single population, as the authors suggest. When allowed to circulate in poultry populations, the viruses can mutate, usually within a few months, into the highly pathogenic form. If beneficial, this flexibility could be passed on to offspring and so can lead to the evolution of new features in a species. WHO fully agrees with FAO and OIE that control of avian influenza infection in wild bird populations is not feasible and should not be attempted. The anacondas of the area are very similar genetically, which causes concern for scientist. The population does not have the diversity to cope with sudden threats like a change in weather. He notes that while most of the world's species live in the tropics their risk is underestimated because only a sliver of data from those regions exists. Why are we the only human species left? I should remind you that the parent population contains multiple references to parents based on their fitness. The researchers note that in the context of the current decline of bee populations worldwide, their research has disturbing implications for what that decline might mean for plants. Researchers usually link speciation to some sort of physical barrier, such as a river or mountain, which divides populations and causes them to evolve independently. All the males in one population sing the same song, but occasionally they invent an entirely new one. The bat star is not harvested by people, so the fishing is not impacting the population. The mutation would probably spread through the population and tip the dynamics of female- female relationships more towards conflict rather than cooperation. Better understanding of the population structure of the fishery is therefore of paramount importance. One of these, rabies, is of particular concern because it is endemic in the dog population. |
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