Answer:
Daytime is when you can see the sun from where you are, and its light and heat can reach you. Nighttime is when the sun is on the other side of the Earth from you, and its light and heat don't get to you. ... It takes 24 hours for the world to turn all the way around, and we call this a day.
Explanation:
Hope this helps!
Answer:
The correct answer is option 4.
Explanation:
Viruses cannot be considered alive as they cannot carry out metabolic reactions on their own. Metabolism signifies the tendency to gather and use energy. The chemical reactions in the cells spontaneously change the molecules into the forms of energy, which can be utilized by the organism.
However, in the case of viruses, they are too small and simple to collect and utilize their own energy. They are completely dependent upon the host cells for energy. The viruses only require energy when they need to make duplicates of themselves, however, they do not require any energy when they are present outside of the cell. Thus, as they cannot carry out metabolic reactions, they are not considered as living.
Land mammals became more common in the Quaternary period, which came after the Neogene, so the first statement is not true.
FIrst whales evolved 50 million years ago and the quaternary period began 2,6 years ago, so the first whales did not evolve during this period.
The quarternary period is famous for its ice ages, so the Earth did not heat up during this period.
There was indeed a rise in the ocean levels during the Neogene period, so this is a true statement
Answer:
They help to stop harmful germs from entering the body
Explanation:
- The skin can prevent bacteria and microorganisms from entering the body (unless it is damaged)
- Mucous membranes line the mouth and nose and are coated with secretions that fight microorganisms and harmful bacteria
- Tears help to clear debris from the eye to prevent infection
