Answer:
50%
Explanation:
DNA replication is a semi-conservative process. It means that after DNA replication, the newly formed DNA molecules have one parental strand and one newly formed strand. The cells in the experiment have DNA with 15N. After one round of DNA replication, each DNA molecule would have one parental DNA strand with 15N and one newly formed DNA strand with 14N.
However, after the second round of DNA replication, each hybrid DNA with strand having 15N and the other with 14N would be unwound. The parental heavy DNA strands would be present in the 50% of the newly formed DNA while the rest 50% of DNA molecules would have both strands with 14N (both light strands).
<span>claus·tro·pho·bi·a
the fear of enclosed, small spaces.
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I believe if her hypothesis was incorrect the percentage of the large lobsters with large pincers would decrease. The large pincers help the lobsters to quickly catch their pray efficiently. This would mean the survival of the lobsters with large pincers. A wrong hypothesis would mean that the large pincer lobsters would die and decrease in number.
Efficiency is the measure of how much work or energy is conserved in a process. In many processes, work or energy is lost, for example as waste heat or vibration. The efficiency is the energy output, divided by the energy input, and expressed as a percentage.
Efficiency is the energy output, divided by the energy input, and expressed as a percentage.
Efficiency = (1350/1500)×100
= 90%
Answer:
The correct option is B) The homologous structures are evidence of descent with modification from a common ancestor.
Explanation:
Homologous structures can be defined as similarities between organs or skeletal of organisms which suggest that they might have a common ancestor in the past. Homologous structures will have alike structures although they may be present in animals of different texa.
For example, The front legs of a frog, which is an amphibian is similar to alligator which is a reptile. This common structure show that they have homologous structures and hence might have had a common ancestor in the past.
