Plant Biology Quiz on Vaucheria and Thallus Organization

The plant body of algae, lacking specialized structures like roots, stems, and leaves.

Algae with a single-celled body, exhibiting diverse forms like amoeboid and flagellated.

Unicellular algae that move using flagella.

Unicellular algae that move using cytoplasmic extensions, resembling an amoeba.

Groups of unicellular algae that associate together.

Groups of unicellular algae that are tightly connected and exhibit a degree of organization.

Algae with a thread-like body, either branched or unbranched.

Algae with a tubular body that lacks cross walls or septa.

Unicellular algae with one or more flagella for movement.

A group of algae that lack flagellated vegetative cells, meaning they don't move using flagella.

The number and arrangement of flagella on a cell are important characteristics in identifying algae.

A thin, flexible structure that aids in movement of single-celled organisms.

A type of flagellum that moves in a whip-like motion.

Algae that lack a rigid outer covering, allowing for flexibility in movement.

Algae that possess a rigid outer envelope, often spherical.

A light-sensitive spot in some algae that helps them detect light.

A type of algal body organization where the thallus is composed of two distinct parts: a basal, creeping system and an erect, upright system.

The basal, creeping system of a heterotrichous thallus, attached to the substratum. It grows apically and produces both photosynthetic and rhizoidal filaments.

The erect, upright system of a heterotrichous thallus, originating from the prostrate system. It's composed of branched photosynthetic filaments.

Filaments in the prostrate system that anchor the thallus to the substratum.

The variation in heterotrichous thalli, where one system is reduced or absent, influencing the overall appearance.

A form of algal body organization that appears parenchymatous, but lacks the true structure of parenchyma, formed by cell division.

A tissue composed of thin-walled, closely associated cells, formed by cell division.

The production of thread-like structures from the cells of a multicellular thallus, increasing its rigidity.

A type of algal thallus with a tubular body lacking cross walls, allowing for continuous cytoplasm and multiple nuclei.

Specialized root-like structures found in some siphonaceous algae like Botrydium, anchoring the thallus to the substrate.

A complex network of interwoven vesicles and tubes found in certain siphonaceous algae like Codium.

A type of algal thallus with a cellular structure that allows for growth in two or more planes resulting in leaf-like or tubular shapes.

A type of parenchymatous thallus that is flat and leaf-like.

A type of thallus construction found in algae where cells are connected end-to-end in a single chain, forming a thread-like structure. Elongation and division occur perpendicular to the filament axis, leading to this characteristic appearance.

A type of filamentous thallus where branches extend from the main filament, increasing the surface area for nutrient absorption or photosynthesis. Branches can arise at various points along the filament.

A form of filamentous thallus construction in some algae where branches arise from a basal holdfast and grow in different directions, creating a more complex structure with a clear distinction between a basal anchoring system and an upright, photosynthetic portion.

A type of filamentous thallus where cells are densely packed together, resembling a solid tissue, although the structure is still composed of individual cells. This arrangement is achieved through frequent branching and secondary growth.

A type of unbranched filamentous thallus where the cells are all identical in structure and function, meaning they can all participate in growth, division, and reproduction.

A type of unbranched filamentous thallus where the cells may be either uninucleate, meaning they have a single nucleus, or multinucleate, meaning they have multiple nuclei.

An unbranched filamentous thallus that is attached to a substrate, usually at least initially, but can become free-living after some time.

A unique type of branching observed in certain cyanobacteria where new filaments appear to emerge from existing filaments, but the actual branching process is not truly understood.

A pseudoparenchymatous thallus with a single central filament surrounded by other filaments.

A pseudoparenchymatous thallus with numerous filaments arranged around a central axis.

An example of a siphonaceous alga, characterized by its unbranched, tube-like structure.

A type of siphonaceous alga, forming a spherical, sac-like structure.

The process of forming new cell walls in algae, which can occur at different stages of the life cycle.

A cell with multiple nuclei, found in some algae like siphonaceous forms.