Prokaryotes are small, single-celled organisms with no membrane-bound organelles. They contain a single circular strand of DNA, and no nucleus. Eukaryotes are larger, single or multicellular organisms with cells that contain membrane-bound organelles. They have many linear str...
According to the first paragraph, which of the following was true of small planktonic organisms at the end of the Cretaceous?A. They lost their main sources of food B. They developed calcareous shells. C. They decreased greatly in number as did many other types of organisms D. They ...
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A new kind of radar has been developed for space-age travelers. A working laboratory model of a new system of radar that makes use of a beam of light is said to be ten thousand times more accurate than the best comparable system of radar that uses microwaves. The model has shown that ...
The cell nucleus is an organelle exclusively found in all eukaryotic-celled organisms. The cell nucleus is a membrane-bound organelle and is present and absent in various cell types such as red blood cells and white blood cells. The nucleus is structured with the following components: t...
To become aware of; perceive. Organisms are able to sense their surroundings. To grasp; understand. She sensed that the financial situation would improve. To detect automatically. Sense radioactivity. (Genetics) Of or relating to the portion of the strand of double-stranded DNA that serves as ...
Ninety percent of the ocean floor has not even been recorded and while we have been to the moon,the technology to explore the ocean's floors is still being developed.For example,a permanent partially-underwater sea exploration station,called the Sea Orbiter,is currently in...
A、A. Receiver B、B. Decoding C、C. Encoding D、D. Feedback 查看答案
These procedures can either mechanically create and disperse aerosols or provoke patients to produce aerosols and are recognized as essential sources of respiratory virus transmission in hospitals.39 The risk of aerosol exposure lies in the potential they have to carry infectious organisms, mainly ...
suggesting that all these organisms have developed various mechanisms to interfere with or disrupt these cellular communication systems5,12,13,14,15,16. One of the first mechanisms historically described is related to the production of chemical compounds (quorum sensing inhibitors or QSI), acting as...