What is prothallus Class 11?

Answer: A prothallium, or prothallus is usually the gametophyte stage in the life of a fern or other pteridophyte.

What does prothallus mean?

Definition of prothallus 1 : the gametophyte of a pteridophyte (such as a fern) that is typically a small flat green thallus attached to the soil by rhizoids. 2 : a greatly reduced structure of a seed plant corresponding to the pteridophyte prothallus.

What is prothallus example?

Examples of prothallus If conditions are right, a spore will germinate and grow into a rather inconspicuous plant body called a prothallus. The gametophyte of some non-thallophyte plants — clubmosses, horsetails, and ferns is termed prothallus.

What is the prothallus of pteridophytes?

Prothallus of pteridophytes is inconspicuous small, multicellular, free living photosynthetic thalloid gametophyte. Haploid spore germinats to form a flat green heart shaped prothallus. It is monoecious, i.e., both sex organ male (antheridia) and female (archegonia) are present.

What is prothallus Ncert?

The prothallus is the fern gametophyte. It is a green, photosynthetic structure that is one cell thick, usually heart or kidney-shaped, 3–10 mm long and 2–8 mm broad. The prothallus has both male and female sex organs.

What is prothallus and Thallus?

The key difference between thallus and prothallus is that thallus is an undifferentiated filamentous gametophyte of algae, fungi, lichens, and some liverworts while prothallus is the heart-shaped gametophyte of pteridophytes such as club mosses, horsetails, and ferns.

Is Ginkgo a pteridophyta?

Ginkgoales is a gymnosperm order containing only one extant species: Ginkgo biloba, the ginkgo tree. It is monotypic, (the only taxon) within the class Ginkgoopsida, which itself is monotypic within the division Ginkgophyta /ɡɪŋˈkɒfɪtə/….Ginkgoales.

Is the prothallus Sporophyte or gametophyte?

The prothallus is the fern gametophyte. It is a green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad.

What is difference between thallus and prothallus?

Do mosses have prothallus?

Summary – Protonema vs Prothallus It is a characteristic feature of all mosses and many of the liverworts except in hornworts. The protonema is mainly composed of two types of cells; chloronemata and caulonemata. Prothallus is the gametophyte stage of the life cycle of ferns and other pteridophytes.

Does selaginella have prothallus?

Answer: Unlike other pteridophytes, vegetative prothallus are not formed in selaginella. The antherozoids of Selaginella are the smallest among the vascular plant.

Is plant kingdom important for NEET?

Important notes for NEET Biology- Plant Kingdom covers all the important topics and concepts useful for the exam.

What is prothallus in biology?

A prothallus, or prothallium, (from Latin pro = forwards and Greek θαλλος (thallos) = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well. The prothallus develops from a germinating spore.

What is the meaning of proprothallus?

pro·​thal·​lus | \\(ˌ)prō-ˈtha-ləs \\. 1 : the gametophyte of a pteridophyte (such as a fern) that is typically a small flat green thallus attached to the soil by rhizoids.

What is prothallium in plants?

A prothallium, or prothallus (from Latin pro = forwards and Greek θαλλος (thallos) = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte.

How is prothallus produced in ferns?

The prothallus or prothallium is produced during the sporophytic stages of the fern, that is they are produced by the spores of the plant.