Answer:
Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material. Igneous rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary.
Explanation:
If the student uses alternative energies, the environment is pared the impact of global warming and release of particulate matter.
<h3>Impact of alternative energies</h3>
All over the world, fossil fuels have been the dominant source of energy for several households. The impact of these fossil fuels is increase in the amount of carbon dioxide and particulate matter released into the environment.
If the student uses alternative energies, the environment is pared the impact of global warming and release of particulate matter.
Learn more about fossil fuels: brainly.com/question/2029072
Answer:
B. bradycardia
Explanation:
Bradycardia, also known as slow heart rate, is usually slower than 60 beats per minute.
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Answer:
1. 25% percent of daughter molecules are composed of hybrid DNA after 3 generations
2. 0% of daughter molecules would be composed of hybrid DNA if DNA exhibited conservative replication
Explanation:
1. According to semi conservative model of replication, the two DNA strands separate during replication and each gives rise to a new DNA strand. So in a newly synthesised DNA molecule one strand is old and one stand is new.
Here, the medium contained 15N so all DNA molecules had 15N in beginning. Then they were transferred to 14N medium. After first round of replication all the molecules will be 15N14N hybrid since 14N will be used now for replication. After second round of replication 50% of molecules will be 14N14N and other 50% will be hybrid. After third round of replication, 75% molecules will be 14N14N and 25% will be hybrid.
2. According to conservative model of replication, parental DNA strands stay together after replication so a newly synthesised DNA molecule will have both new strands. In this case, a hybrid will never be formed since the 15N15N strand will always remain together and all the subsequent DNA molecules will have 14N14N composition.