Answer:
The correct statement is A larger brain allows humans to solve complex problems.
Explanation:
From the ancient time, the human brain has size increased three times. The most probable reason for the evolution of brains is that larger brain allows humans to handle complex problems more easily.
complex and large brains help humans to understand and store a different type of knowledge and information and aids in interacting with each other.
The current time human has a larger and complex brain in any living primates.
Thus, the correct statement is A larger brain allows humans to solve complex problems.
Answer: C- The atoms have different atomic numbers
Explanation:
The correct answer is option C
The rain forest has millions and billions of plant species that is investigated every year for its medicinal properties. But it has not been possible till yet to test half of the rainforest plant for its medicinal properties. There are many species that has been tested earlier and is now used for its medicinal properties.
Explanation:
Red-shift
Emission spectra
Light from a star does not contain all the wavelengths of the electromagnetic spectrum. Elements in the star absorb some of the emitted wavelengths, so dark lines are present when the spectrum is analysed. Different elements produce different patterns of dark lines. The diagram shows part of the emission spectrum of light from the Sun.
A gradient colour spectrum of the sun.
Spectra from distant galaxies
Astronomers can observe light from distant galaxies. When they do this, they see it is different to the light from the Sun. The dark lines in the spectra from distant galaxies show an increase in wavelength. The lines are moved or shifted towards the red end of the spectrum. This effect is called red-shift. The diagram shows part of the emission spectrum of light from a distant galaxy.
A gradient colour spectrum of a distant star.
Red-shift and speed
Astronomers see red-shift in virtually all galaxies. It is a result of the space between the Earth and the galaxies expanding. This expansion stretches out the light waves during their journey to us, shifting them towards the red end of the spectrum. The more red-shifted the light from a galaxy is, the faster the galaxy is moving away from Earth
