Class 9 Practice Level 3 - Set 1 – Tissues

Total questions: 15

How does the structure of xylem vessels differ from tracheids, and what implications does this have for their function in water transport?

Topic: plant Tissues

Xylem vessels are shorter and narrower, which slows down water transport.

Xylem vessels are longer and wider, which allows for more efficient water transport.

Xylem vessels are living cells, making them more flexible.

Xylem vessels have secondary thickening, which impedes water transport.

None

Discuss the significance of lignin in sclerenchyma cells.

Topic: plant Tissues

Lignin provides flexibility and allows cells to bend.

Lignin strengthens cell walls, making them rigid and supportive.

Lignin increases the water permeability of cell walls.

Lignin makes cell walls transparent to light.

None

How do plasmodesmata facilitate intercellular communication in plant tissues?

Topic: plant Tissues

By allowing the movement of water only

By connecting the cytoplasm of adjacent cells

By transporting minerals through the cell wall

By creating impermeable barriers between cells

None

Compare and contrast the functions of collenchyma and parenchyma cells in plants.

Topic: plant Tissues

Both provide structural support but collenchyma cells are involved in photosynthesis.

Parenchyma cells are involved in photosynthesis and storage, while collenchyma cells provide flexible support.

Collenchyma cells conduct water, while parenchyma cells conduct food.

Both are primarily involved in the transport of nutrients.

None

Explain how the endodermis and Casparian strip regulate the entry of water and nutrients into the vascular system of roots.

Topic: plant Tissues

The endodermis allows free passage of substances into the xylem.

The Casparian strip acts as a selective barrier, forcing water and solutes to pass through cell membranes.

The endodermis transports nutrients directly into the phloem.

The Casparian strip enhances water evaporation from the roots.

None

How do the structural differences between smooth and striated muscle tissues relate to their functions in the body?

Topic: Animal Tissues

Smooth muscle cells are striated and involved in voluntary movements.

Striated muscle cells are non-striated and control involuntary movements.

Smooth muscle cells are non-striated and control involuntary movements; striated muscle cells are involved in voluntary movements.

Both muscle types are striated and involved in voluntary movements.

None

Describe the role of tight junctions in epithelial tissue.

Topic: Animal Tissues

To facilitate nutrient exchange between cells

To create a watertight seal between adjacent cells

To anchor epithelial cells to the basement membrane

To allow the passage of ions and small molecules

None

How do osteoclasts and osteoblasts work together to maintain bone homeostasis?

Topic: Animal Tissues

Osteoclasts form new bone; osteoblasts break down old bone.

Osteoclasts break down old bone; osteoblasts form new bone.

Both cell types are involved only in bone formation.

Both cell types are involved only in bone resorption.

None

Discuss the role of microglia in the central nervous system.

Topic: Animal Tissues

Microglia produce myelin to insulate neurons.

Microglia form the blood-brain barrier.

Microglia act as immune cells, defending against pathogens.

Microglia facilitate the transmission of nerve impulses.

None

10.

How do the properties of reticular fibres support the function of reticular connective tissue?

Topic: Animal Tissues

Reticular fibres provide elasticity, allowing tissues to stretch and recoil.

Reticular fibres form a delicate network that supports cells in lymphoid organs.

Reticular fibres are rigid, providing structural support to bones.

Reticular fibres are impermeable, preventing fluid movement.

None

11.

How does the secondary thickening of xylem contribute to the overall strength and function of woody plants?

Topic: plant Tissues

Secondary thickening reduces the flexibility of the plant, making it more rigid.

Secondary thickening decreases the diameter of xylem vessels, slowing water transport.

Secondary thickening increases the girth of the plant, providing additional support and water transport capacity.

Secondary thickening increases the girth of the plant and reduces water transport capacity.

None

12.

Describe the process by which sieve tube elements and companion cells work together to transport nutrients in plants.

Topic: plant Tissues

Sieve tube elements store nutrients, while companion cells transport them.

Companion cells regulate the opening of sieve plates, allowing nutrient flow.

Sieve tube elements transport nutrients, while companion cells provide metabolic support.

Both cell types independently transport nutrients.

None

13.

How do the different layers of the periderm (cork cambium, cork, and phelloderm) contribute to the protection and functioning of woody plants?

Topic: plant Tissues

The cork cambium produces new leaves, cork provides insulation, and phelloderm transports water.

The cork cambium produces cork cells, cork acts as a protective barrier, and phelloderm provides metabolic support.

All layers function primarily in nutrient storage.

The periderm layers have no functional relationship.

None

14.

Muscle fibers that are interconnected by oblique bridges are:

Topic: plant Tissues

Cardiac muscle fibers

Striated muscle

Skeletal muscle fibers

Smooth muscle fibers

None

15.

How does the differentiation of cells in the apical meristem lead to the formation of various tissues in a plant?

Topic: plant Tissues

Apical meristem cells remain undifferentiated throughout the plant's life.

Differentiation of apical meristem cells leads to the formation of specific tissues like epidermis, ground tissue, and vascular tissue.

Apical meristem cells differentiate only into vascular tissues.

Differentiation of apical meristem cells inhibits plant growth.

None

1 out of 15

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Class 9 Practice Level 3 - Set 1 – Tissues

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