Answer:
Option (A)
Explanation:
The geological time scale is usually defined as the sequential arrangement of all the major and contrasting events that has taken place on earth right after the formation of the earth about 4.6 billion years back.
This scale is comprised of distinct eons, epochs and periods, which are classified on the basis of the major events occurred in the geological time, such as the great mass extinction events, asteroid impacts, abundant supply of oxygen, introduction of new and extinction of old living species.
This is how the boundaries between the intervals of the geological time scale are determine.
Thus, the correct answer is option (A).
The Islam emerged in the sixth century AD, and with it, the first Islamic states started to occur. The Islamic states started to occur because this religion managed to unite lot of tribes and create one powerful entity. The military strength was big, so it was used for expansion, and on the territories that were conquered, the people were converted to Islam, very often forcefully. This has resulted in rapid change of the political and religious map of the world, with a very large area becoming dominated by Islam. The Islamic states, once properly established, flourished and were very advanced, having big achievements in numerous scientific fields. Unfortunately, the fundamentalist fraction managed to prevail over time and stopped the progress, so gradually the Islamic states started to fall behind the other parts of the world when it came to development, and that can be seen even nowadays.
Answer:
Option B
Explanation:
Vertical farming is advantageous over the traditional farming practices in the following ways
a) It require lesser area
b) It uses less water as compared to the water used in traditional farming
c) Different types of crops can be grown at one one time as the same plot area is not used.
Growing crops for a year in not an advantage of vertical farming and hence option B is the correct answer
Answer:
C) Photosynthetic bacteria, invertebrates, vertebrates, reptiles, amphibians, mammal.
Explanation:
- From looking at the above records of evolutionary life on earth the traces of living fossils and organisms that are evolved to the biogenic carbon signatures and the earliest known stromatolite fossils on earth the evidence of 3.7 billion year rocks taken from western Greenland.
- All show the occurrence of first life forms as photosynthetic bacteria and evolution of soil and oxygen in it took place then the invertebrates plat and animals appeared on land and oceans like the nematodes and arthropods, after which started to evolve like the vertebrates like the tetrapod the first fish with four limbs in 360 million years.
- After which reptiles and dinosaurs are the largest land reptiles evolved and then came the amphibian likes and then lead to the evolution of man and other mammals.