Answer: They are loosely packed so as to allow gas exchange in air spaces to move freely
Explanation: The mesophyll cells of the spongy cells are packed loosely, in order to allow proper and efficient gaseous exchange to take places easily. The large air pocket of the mesophyll cell allow gas exchange between different areas of the leaves. The cells in mesophyll, contains few chloroplast which are generally responsible for photosynthesis. Gas exchange in the mesophyll cells of the spongy layer allows photosynthesis to take place.
It usually takes about 48 hours after sun exposure
The rapid leaf movements resulting from a response to touch (thigmotropism) primarily involve<u> potassium channels.</u>
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- Thigmotropism is a directional growth movement that develops in response to a touch stimulation through the mechanosensory system.
- Plant biologists have also discovered thigmotropic reactions in blooming plants and fungus, while thigmotropism is often found in twining plants and tendrils.
- A directed growth movement known as thigmotropism happens in response to touch. Typically, twining plants and tendrils that coil around supports exhibit thigmotropism.
- The trigger for the geotropism process is gravity. A plant organ's directional response to physical contact or touch with a solid object is known as thigmotropism.
- The induction of some pattern of differential growth typically results in this directional reaction.
- The climbing tendrils of some plants, such the clinging fern, provide a clear illustration of this phenomena.
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D I think hope this helps
Here are the four postulates of natural selection. These are <span>features, differences in population members' ability to reproduce and survival of the fittest in terms of variability, heritability and reproduction. Hope this answers your question. Have a great day!</span>
