The answer is the superposition principle.
The superposition principle states that the oldest rocks occurs on the <span>bottom of an undisturbed rock sequence. In other words, if the layers or rocks have not been disturbed, older rocks will lie beneath younger rocks. The principle is one of the most fundamental principles of geology. It could be very useful in determination of relative age of fossils.</span>
Answer:
150mm is 1.50 decimeter
Explanation: There are 10 decimeters in each meter and 1000mm in each meter.
1000/10=100mm in each decimeter
150mm is 150/100=1.50 decimeter
Answer:
Option (b).
Explanation:
Melting temperature may be defined as the temperature at which the DNA strand melts. The melting temperature depends on the Guanine and cytosine content of the DNA.
The thymine binds with Adenine with two hydrogen bonds whereas cytosine binds with guanine with three hydrogen bonds. More energy is required to break the guanine cytosine bonds and they have high temperature. The second strand 5'-ACGGCTACG-3' contains more GC content and hence have high melting temperature.
Thus, the correct answer is option (b).
Negative impact on the environment by dams:
We all know that dams are important where there is heavy flow of water. Dams also have negative impact which are numerous and varied. They create impact on biological, chemical and physical properties. When dams are built across the river, fish migrations are affected. They also trap the sediments which affects the physical processes.
The temperature changes, composition of chemicals and the dissolved oxygen levels are not suitable for aquatic plants and animals. Due to the downstream of riverbed in dams it may affect more than 100 kilometers below a dam.
Thus, we can conclude that construction of dams can affect aquatic species, loss of forest, wetland and farmland and extinction of birds in the floodplains.
The answer for the above question is One chance in two.
<span>One chance in two because the parent can only bare a son or a daughter, therefore getting a daughter would give a probability of half and getting a son would give a probability of a half. These are the only possible outcomes getting a daughter or a son. </span>
