A Bunsen valve is a simple device that Group of answer choices allow gas flow in only one direction keeps a flask sealed does all of these keeps the salts from plugging the tube

A Bunsen valve is a simple device that

Select one:

a. Allow gas flow in only one direction

b. Does all of these

c. Keeps a flask sealed

d. Keeps the salts from plugging the tube

a. Allows gas flow in one direction

Explanation:

A Bunsen valve is a simple device that should not be confused with Bunsen burner.

It is fitted with glass tubes and a thin opening is made using scalpel. When the pressure becomes excessive it opens and vents out the excess gas hence maintaining unidirectional flows of the gas.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.