You are looking through a microscope at onion cells and you see a cell with the sister chromatids lined up across the middle of
the cell. what phase of mitosis are you observing?
2 answers:
Answer:
The correct answer would be Metaphase.
The metaphase is the second stage of the mitosis during which all the sister chromatids are arranged at the imaginary central line termed as metaphase plate.
The centromere of each chromosome is attached with two microtubules coming from the opposite ends of a cell.
It helps in equal distribution of sister chromatids into two daughter cells.
Once the metaphase passes the cell cycle checkpoint, the cell progress to anaphase.
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Answer:
- 400-450 nm
- 550-700 nm
Explanation:
Chlorophyll pigments (mainly chlorophyll a and b) absorb the red and blue spectrum of visible light in the electromagnetic spectrum for photosynthesis. This is why leaves appear green (and occasionally orange) because this visible light portion is not absorbed. The blue light absorbed by leaves ranges between 400 – 450 nm while the red light ranges between 500 nm and 700 nm.
