What is a vegetative cell quizlet?

Vegetative cell. a cell of a bacterium or unicellular alga that is actively growing rather than forming spores. Endospore. a resting structure formed inside some bacteria. Sporangium.

What is a vegetative cell in microbiology?

noun. Botany Microbiology. A cell of a bacterium or unicellular alga that is actively growing rather than forming spores. ‘These bacteria exist either as spores or as vegetative cells. ‘

What is a vegetative organism?

Bacteria can live in a vegetative state in which they can grow and reproduce. … Few of them can also exist in spore form which is unable to grow or reproduce but can help the bacteria to survive in an environment that is unfavourable for growth.

What is the function of a vegetative cell?

In pollen grains, the known function of the vegetative cell is to extend a pollen tube to transport the two sperm cells to the embryo sac for fertilization.

Are vegetative cells metabolically active?

Vegetative cells are the normal living cells that are metabolically active. Vegetative cells produce small structures called spores when the environmental conditions are not good for vegetative cells to survive.

What is fungi sporulation?

THE sporulation of fungi usually occurs when suitable conditions of nutrition and aeration are provided. It appears that whereas the conditions inside plant cells commonly admit of the formation of resting spores, they are, in general, less suitable for the formation of non-resting ones.

What is vegetative and generative cell?

The generative cell produces two sperm cells, or male gametes, whereas the vegetative cell produces an elongated pollen tube, a gametophytic cell, to deliver the male gametes to the embryo sac.

What is the shape of vegetative cell?

Vegetative cells are spherical to ovoid, 2–30 μ m in diameter with one long flimmer flagellum and one short smooth flagellum. Typically there are one or two golden-brown chloroplasts and one or more contractile vacuoles, and a stigma may or may not be present.

What are active vegetative cells?

Endospores germinate back into vegetative cells (an active bacterial cell that undergoes metabolism) when surrounding environmental conditions favor bacterial growth and reproduction.

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What does Vegitated mean?

intransitive verb. 1 : to lead a passive existence without exertion of body or mind. 2a : to grow in the manner of a plant also : to grow exuberantly or with proliferation of fleshy or warty outgrowths. b : to produce vegetation.

What is vegetative reproduction answer?

Vegetative reproduction, any form of asexual reproduction occurring in plants in which a new plant grows from a fragment of the parent plant or grows from a specialized reproductive structure (such as a stolon, rhizome, tuber, corm, or bulb).

Is vegetative cell is larger than generative cell?

Vegetative cell is larger than generative cell. … To give birth to two male gametes, generative cells divide. A generative cell and a vegetative cell are present in each mature pollen grain in angiosperms.

How is a vegetative cell different from a generative cell?

The main difference between vegetative and generative cell is that vegetative cell produces a tube cell whereas the generative cell produces two sperm cells during the pollen development. … Vegetative and generative cell are two types of cells present in the pollen grain of higher plants.

Is vegetative cell spindle-shaped?

Vegetative cell has an irregularly shaped nucleus, and the generative cell is spindle-shaped with dense cytoplasm & nucleus. Vegetative cell is also termed as Tube cell as it is responsible for growth of pollen tube.

What is the shape of generative cell?

The generative cells, liberated from the vegetative cell cytoplasm of the pollen protoplasts, were initially spindle-shaped with two long, oppositely oriented extensions, and were surrounded by two cell membranes, one on each side of a wall of uniform thickness.

How do vegetative bacterial cells divide?

Most bacteria rely on binary fission for propagation. Conceptually this is a simple process; a cell just needs to grow to twice its starting size and then split in two. … Before binary fission occurs, the cell must copy its genetic material (DNA) and segregate these copies to opposite ends of the cell.

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What is a metabolically active and growing cell?

Endospore. The metabolically active and growing stage. Vegetative cell.

What two genera produce endospores?

Endospores are dormant alternate life forms produced by the genus Bacillus, the genus Clostridium, and a number other genera of bacteria, including Desulfotomaculum, Sporosarcina, Sporolactobacillus, Oscillospira, and Thermoactinomyces.

What is conidia formation?

The process of producing non-motile spores, called conidia, via mitotic asexual reproduction in higher fungi. … They are produced by conversion of hyphal elements, or are borne on sporogenous cells on or within specialized structures termed conidiophores, and participate in dispersal of the fungus.

What chemical is synthesized during sporulation?

SASP is synthesized during sporulation and it binds to DNA in core and protect it from potential damage caused by UV radiation, desiccation and drying. In addition, SASPs also provides nutrition and energy for spore germination.

What is germination and sporulation?

As nouns the difference between sporulation and germination is that sporulation is the process of a bacterium becoming a spore while germination is the process of germinating; the beginning of vegetation or growth from a seed or spore; the first development of germs, either animal or vegetable.

What is generative cell?

[ jĕn′ər-ə-tĭv ] A cell of the male gametophyte (pollen grain) of seed plants that divides to give rise directly or indirectly to sperm.

What is tube cell?

[ tōōb ] The cell in the pollen grain that develops into the pollen tube (the tube which conveys the male gametes of seed-bearing plants to the ovule).

Is tube cell a vegetative cell?

one of them, the so-called vegetative, or tube, nucleus seems to direct the operations of the growing structure. The other two, the generative nuclei, can be thought of as nonmotile sperm cells.

Why is vegetative cell called tube cell?

Vegetative cell is the largest cell of male gametophyte in plants. It stores food and produces pollen tube. It is usually called tube cell not at fixed time as it develops pollen tube during the pollen pistil interaction to deliver the sperm nuclei inside the embryosac.

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What is vegetative nucleus?

(vegetative cell) The large nucleus formed within the pollen grain of angiosperms along with one or two smaller generative nuclei. It is thought to control the growth and development of the pollen tube and disintegrates when the pollen tube penetrates the nucellus. …

Why are vegetative cells of cyanobacteria green?

The vegetative cells carry out photosynthesis and that is why cyanobacteria were called blue-green algae in the first place. Heterocysts fix atmospheric nitrogen, something the vegetative cells cannot do. … When there is not enough fixed nitrogen to go around, one of the vegetative cells becomes a heterocyst.

What is vegetative stage of fungi?

The vegetative body of a fungus is a unicellular or multicellular thallus. … The vegetative stage consists of a tangle of slender thread-like structures called hyphae (singular, hypha ), whereas the reproductive stage can be more conspicuous. The mass of hyphae is a mycelium.

What is a spherically shaped bacterial cell termed?

Coccus, plural Cocci, in microbiology, a spherical-shaped bacterium. … Pairs of cocci are called diplococci; rows or chains of such cells are called streptococci; grapelike clusters of cells, staphylococci; packets of eight or more cells, sarcinae; and groups of four cells in a square arrangement, tetrads.

Are endospores internal or external?

Endospore. Then there is the endospore, a marvel of bacterial engineering. This is located under the heading “bacterial internal components,” but it is important to note that an endospore isn’t an internal or external structure so much as a conversion of the cell into an alternate form.