Question

Question 14 2 pts What is the name of the structures where the spores are produced in this plant? Next →

Answer 1

Question 14:- the structure where spores are produced is sporangia which is present multiple in sori.

v Fern structure

The image shows the sori of the fern each of the round dots contain multiple sporangia.

In the ferns, the sporangia are clustered into dense aggregations called ‘sori’, which appear as round dots on the under side of the fronds. Conversely, the sporangia of the lycophytes are on the upper side of the leaves or along the stems.

The microsporangia of the angiosperms (flowering plants) develop within the anther of the stamen. The microspores produced within the microsporangia—of which there is typically four per anther—eventually develop into pollen grains.

Pteridophytes are vascular plants. Leaves called sporophylls produce clusters of capsular structures called sporangia that bears spores which germinate and yield gametophytes. Hence they show alternation of generations, in which a sporophyte produces spores through meiosis and a gametophyte forms gametes by mitosis.

Question 23:- the name of the generation in the letter A is sporophyte.

Question 24:- the organisim belong to the phylum Zygomycota.

Rhizopus stolonifer is more commonly known as black bread mold. Rhizopus specifically means any rot causing fungi. This type of mold also has a synonym name of Rhizopus nigricans.

Rhizopus stolonifer is classified as a member of the Eukarya because it has cells that are organized into complex structures that are enclosed within membranes, along with membrane bound nuclei and other organelles in those cells.

Kingdom: Fungi

The kingdom Fungi consists of organisms that are heterotrophic. Rhizopus stolonifer is a mold that lacks chlorophyll, is non-motile, filamentous, and a decomposer of organic material.

Phylum: Zygomycota

Rhizopus stolonifer belongs to the phylum Zygomycota because it sexually produces zygospores and is considered saprophytic and parasitic.

Class: Zygomycetes

The Zygomycetes all have chitenous cell walls in a coenocytic mycelium and they lack motile spores.

Order: Mucorales

Rhizopus stolonifer is a member of the Mucorales because it is fast growing, with wide hyphae, that lack septa or is coenocytic, and grow within a substrate. Rhizopus stolonifer is also considered a member of the Mucorales because it is a major saprophyte, or grows and acquires nutrients from dead and decaying matter​​​​​​

Family: Mucoraceae

Rhizopus stolonifer is a part of the family Mucoraceae due to the key feature of a swollen extension of the sporangiophore, called the columella. It looks like a balloon within the sporangium and it often persists after the spores have been released.

Genus: Rhizopus

Rhizopus stolonifer is a member of the Rhizopus species because it is a rot causing fungus that has columnar hemispherical aerial sporangia anchored to the substrate by rhizoids.

Species: Rhizopus stolonifer

There are multiple species of Rhizopus, but Rhizopus stolonifer earned this species name because it is a black mold that grows on bread and its spores float around in the air. Rhizopus stolonifer also uses rhizoids as a way to anchor itself to the vast array of substrates it can come in contact with.

Identification Tips:

To identify Rhizopus stolonifer look for either a grayish fluffy mass or a blue or yellow colored coating on the substrate. Black spores are also visible to the eye on the surface of the substrate, which may look like black specs. The interesting looking fungi can appear on stale bread, damp leathers, and decaying fruits of which are kept at favorable temperatures.