★ Cell Structure and Functions Quiz
Who am I? I am dead at maturity and have secondary cell walls composed of lignin.
A. sclerenchyma
B. collenchyma
C. parenchyma
D. phloem
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Used in places where diffusion needs to occur, such as blood vessels and air sacs of lung
A. Simple cuboidal
B. Simple squamous
C. Simple columnar
D. Stratified squamous
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