Yahoo Canada Web Search

Search results

  1. People also ask

  2. In the floating leaf disk assay, 10 or more leaf disk samples are punched out of a leaf. In the next step, a vacuum is used to replace the air pockets within the leaf structure with a baking soda (bicarbonate) solution.

  3. This is because leaves have air in the spaces between cells, which helps them collect CO 2 gas from their environment to use in photosynthesis. When you apply a gentle vacuum to the leaf disks in solution, this air is forced out and replaced with solution, causing the leaves to sink.

  4. Jul 26, 2022 · As oxygen is produced by photosynthesis, it comes out of solution and infiltrates the leaf tissue, replacing some of the water. This decreases the density of the disks, and they begin to float. The number of disks that float per unit of time gives a measure of the rate of photosynthesis.

  5. Jun 30, 2019 · Watch spinach leaf disks rise and fall in a baking soda solution in response to photosynthesis. The leaf disks intake carbon dioxide from a baking soda solution and sink to the bottom of a cup of water. When exposed to light, the disks use carbon dioxide and water to produce oxygen and glucose.

    • Anne Marie Helmenstine, Ph.D.
  6. Jul 11, 2023 · To measure the rate of photosynthesis, you will replace the air in the spongy mesophyll in your leaf disks with a liquid. This will cause the leaf disks to sink. Then you will put these leaf disks in water with dissolved CO 2 and measure the amount of time it takes for the leaf disks to float.

  7. 1. Do your leaf disks float? Use the information in this diagram of a cross-section of a leaf to explain why a leaf disk would float. The white oval in the center of each cell represents a vacuole which is filled with water with dissolved substances. The dark spots in the mesophyll cells represent chloroplasts.

  8. Do your leaf disks start to float sooner in a colder or a warmer baking soda solution? Test how the intensity of the light affects photosynthesis. Place the cup closer to your light source and farther away.

  1. People also search for