Answer:
The correct answer is A. primate and trilobite fossil in the same rock layer
Explanation:
Trilobita is a class of marine arachnomorph arthropods that become extinct at the end of the Permian mass extinction about 250 million years ago. They were one of the most successful animals on earth and lived around 300 million years even more that dinosaur.
The fossil of early primates are nearly 55 million years old and the trilobite become extinct at least 250 year ago, therefore, this discovery provides evidence against the theory of evolution because the fossil of animals who extinct earlier should be found in lower region of soil than the fossil of animals who extinct later. Therefore the correct answer is A.
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F
Answer:
The given statement is true.
Secondary succession refers to the series of community changes that take place on previously established but damaged or disturbed habitat.
It helps in reviving or re-establishment of the similar ecosystem that previously existed.
It starts by a disturbing event such as natural disaster (hurricane, tornado, earthquake et cetera) and human interventions (deforestation, accidental forest fires caused by human activities, habitat destruction due to mining or dam construction et cetera) which greatly reduce the ecosystem already established.
The correct answer is Stimulus.
A thing or an event that provokes a specific functional response in an organ or tissue of an organism is called as stimulus. It can be anything like heat, light, water, chemical et cetera. Any stimulus when encountered by the organism produces response in reference with the stimulus generated by the external environment or other organism.
Answer:
Green house gases are the type of gases present in the air which have the ability to trap heat of the earth's surface. Gases like carbon dioxide and methane are found naturally and are known to play an important role in earth's climate. If they are not found the earth' s climate would be too cold creating problem for survival of life on the earth.
These green house gases absorb the emit the radiation in the thermal infrared range. These gases act like a blanket and save earth surface from infrared radiation by absorbing them and prevent them from escaping out of the earth surface.
But now a days due to increased in the concentration of green house gases like carbon dioxide and methane due to pollution and deforestation causing a great problem called as green house effect which lead to global warming and it a great concern for all the people now a days.
Greenhouse gases refer to the gases, which are crucial to maintaining a suitable temperature for life on Earth. Examples are methane, carbon dioxide, and nitrous oxide.
Greenhouse gases such as water vapor, methane, fluorinated gases, and carbon dioxide trap the sunlight and raise the temperature of the Earth keeping it warm.
The gases are a concern for the environment and life on earth as in the absence of these gases, the Earth's climate will be extremely cold and chilly.
These gases act as a protective blanket, saving them from infrared rays and other harmful rays. Also, the increased emission of these gases is leading to global warming, which is one of the major threats to life on Earth.
Thus, greenhouse gases are essential but their increased emission is a major concern for the planet.
Learn more about greenhouse gases here:
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