Are viruses alive? This question is debated among scientists throughout the world. Consider the following passage. Scientific re
searchers discovered agents that behaved like bacteria causing diseases such as rabies and hoof-and-mouth, but were much smaller. At this time it became the general view that viruses were biologically "alive." This perception changed in 1935 when the tobacco mosaic virus was crystallized and scientists demonstrated that the particles lacked any mechanisms necessary for metabolic function. It was determined that viruses consisted of a nucleic acid, DNA or RNA, surrounded by a protein shell and the scientific view changed: viruses are complex biochemical mechanisms but not alive. According to the passage, the MOST IMPORTANT evidence supporting the opinion that viruses are not alive is that they A) cause disease. B) contain DNA or RNA. C) are much smaller than bacteria. D) do not have a cellular structure.
Martin Luther King Jr. is ultimately responsible for the beginning of the Civil ... Rosa Parks did not intend to make a political or social statement when she ... Which detail from the Rosa Parks and the Montgomery Bus Boycott best support the ... Colvin was one of the first women to refuse to give up her seat on the bus, her ...
Diatoms are one of the most important and abundant components of marine phytoplankton with two valves (frustules) composed mainly of silica (SiO2). Average size is 10-100µm
Inhabit all aquatic environments. They occur in the body of the water as plankton or on the bottom where they may be attached to plants or rocks or sand particles or maybe free-living and able to move between particles of the substratum. In the open ocean, they live only in the upper 200 m of the surface water.
Diatoms produce an estimated 20% to 25% photosynthesis on the planet
.
Hence, diatoms are correct answer this is because the primary producer it must be resistant to physical damage from wave action
