Question

does xylem vessels have pits​

Answer 1

Answer:

Vessels are elongated dead cells found in the xylem of flowering plants, consisting of perforated cell walls throughout which the water flows. Vessels are only found in Angiosperms. They (vessels) contain a large number of small pits. Vessels are efficient in conducting water due to presence of perforations.

Explanation:

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Answer 2

Answer:

Effects of Air Pollution

High levels of air pollution can cause an increased risk of heart attack, wheezing, coughing, and breathing problems, and irritation of the eyes, nose, and throat. Air pollution can also cause worsening of existing heart problems, asthma, and other lung complications.