Mature mammalian red blood cells lack nuclei, mitochondria and rough endoplasmic reticulum, they do not contain DNA and consequently, cannot divide. They also cannot synthesise RNA nor synthesise any new proteins, and consequently, have a limited lifespan. Mature red blood cells circulate for about 100–120 days in the body before they are removed by the spleen.
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Hello, Umarhaley.
For question 12 the answer is :
B, since the fluid moves from an area of high concentration to lower concentration to calibrate it!
For question 13 the answer is :
B, because diffusion is movement from high concentration to lower concentration while osmosis is movement of water in high to low concentration!
For question 14 the answer is :
B, because that's where eurokaryotic does the process of DNA synthesis on the nucleus!
For question 15 the answer is :
C, mitosis as it is cell division that help the plant grow longer to reach the water by its 2 daughter cells.
-procklown
Answer:
Option 1: Connect left and right hemisphere
Explanation:
The function of Corpus Callosum is to establish communication between the left and right hemispheres of the brain.
Like 50 miles for the outermost layer which is called the LITHOSPHERE
