Biology, 09.02.2022 05:30 allyssaharrisooy50au
Heavy DNA ( N15 DNA), hybrid DNA, and light DNA ( N14 DNA) can be separated by centrifugation. If cells containing N15 DNA are transferred to a medium with only N14 NH4Cl as a nitrogen source, what percent of daughter molecules are composed of hybrid DNA after 3 generations
Answers: 1
Biology, 22.06.2019 11:30
Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.
Answers: 1
Biology, 23.06.2019 00:00
Ascientist observes certain changes in the physical features of a particular species over time. she concludes that the species has undergone evolutionary change. she wants to study the animals by analyzing their population. she’ll use . the population of this species is decreasing considerably. if this trend doesn’t change, this species will fall under the category of animals. this is a plato question,i need to make up his biology credit.
Answers: 3
Heavy DNA ( N15 DNA), hybrid DNA, and light DNA ( N14 DNA) can be separated by centrifugation. If ce...
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