Question

Sketch what you observe when examining the onion root tip using the low-power lens and the high-power lens. Label the sketches or write a brief description of your observations.

Answer 1

Most plant cells look like bricks with a circle inside.

Answer 2

Under high-power lens, onion root tip appear as large, rectangular interlocking cells. It is clearly visible that cells are surrounded by distinct cell walls. Each cell has a dark stained nucleus. Large vacuoles are also observed in the cells. Small starch granules are also present inside the cells within the cytoplasm.  Since root cells do not take part in photosynthesis, no chloroplasts are observed.