A student concludes that a virus is unable to reproduce on its own. Which piece of evidence supports this conclusion?Apresence of a protective envelope in the virusBabsence of structures that make proteins in the virusCabsence of structures that allow locomotion in the virusDpresence of a genetic material in the viru

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation