Photosynthesis is used by plants for energy. In addition to carbon dioxide and water, light and chlorophyll are required for photosynthesis to work.
Answer:
The answer is C. The birth rate is higher than the death rate.
We can see in the graph that in Africa the birth rate is very high, it is expected that by the year 2050 in Africa there will be 2 billion people, which is more than 1000% of the people living in Africa today. This means that more people are born than those who die.
nation:
Explanation: As the DNA is present in the nucleus, there is compartmentalisation and the process becomes more efficient without the interaction of external bodies. The membrane of the nucleus protects the DNA from injuries.
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The ribs articulate with the (a) thoracic vertebrae.
There exists 12 pairs of ribs. Each rib is a thin flat bone attached dorsally to the vertebral column as well as ventrally to the sternum.
First seven pairs of ribs are known as 'true ribs'. They articulate with the thoracic vertebrae dorsally and are ventrally attached to the sternum by means of of hyaline cartilage.
The 8th, 9th as well as 10th pairs of ribs do not articulate directly with the sternum but unite with the 7th rib with the support of hyaline cartilage. These are called 'false ribs'.
Remaining two pairs i.e. the 11th and 12th pairs of ribs are not attached ventrally and are thus, termed as 'floating ribs'.
To learn more about thoracic vertebrae here
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