Lecture 1: Basic plant cells and tissues

What are the three main tissue types in plants?

• Epidermis, vascular, and ground tissues

• Parenchyma, collenchyma, and sclerenchyma

• Dermal, meristematic, and storage tissues

• Xylem, phloem, and epidermal tissues

Which characteristic is unique to parenchyma cells?

• They have thick secondary walls

• They are always dead at maturity

• They retain meristematic properties

• They only function in photosynthesis

What is the main component that causes wall thickening in collenchyma cells?

• Lignin

•  Cellulose

• Hemicellulose

•  Suberin

Which type of sclereid is commonly found in pear fruits?

• Osteosclereid

•  Brachysclereid

• Macrosclereid

• Astrosclereid

What is the primary function of sclerenchyma cells?

•  Photosynthesis

• Support

• Food storage

• Gas exchange

Which cell type dies at maturity and has an empty lumen?

• Parenchyma

• Collenchyma

• Sclerenchyma

•  Epidermis

Where are macrosclereids typically found?

• In fruit pulp

• In leaf lamina

• In legume seed coats

• In stem cortex

What shape characterizes osteosclereids?

• Star-shaped

• Dumbbell-shaped

• Needle-shaped

• Spherical

Which tissue type serves a protective function in plants?

• Vascular tissue

• Ground tissue

• Dermal tissue

• Meristematic tissue

What is the defining characteristic of chlorenchyma?

• Thick lignified walls

• Involvement in photosynthesis

• Dead at maturity

• Uneven wall thickening