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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Answer:
A: crust, B: mantle, C: outer core, D: inner core.
Explanation:
Do you learn this in 6-7th grade
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.
The Gallbladder stores bile that is produced in the liver
Answer:
D
Explanation:
Its d I think tell me if it's wrong If it is I'm sorry