I believe it would be D, Species Diversity
Crossing over is done in Pachytene stage of meiosis 1 !!
Answer:
16 picograms
Explanation:
According to the given information, the observed cells have 8 picograms of DNA after mitosis. If these cells enter the cell cycle, DNA replication will take place during the S phase of the interphase of the cell cycle. The process of DNA replication would double the DNA content of these cells making it 16 picograms per nucleus.
The S phase of the interphase is followed by the G2 phase and then prophase during which there is no change in the DNA content of the cells. Hence, each of these cells would have 16 picograms of DNA at the prophase of mitosis.
Answer:
The Nervous System
The basic workings of the nervous system depend a lot on tiny cells called neurons. The brain has billions of them, and they have many specialized jobs. For example, sensory neurons send information from the eyes, ears, nose, tongue, and skin to the brain.
Explanation:
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