Question

1 132
132. Read the following statements (A-D) :
(A)In fungi, plasmogamy always occurs between non-motile gametes

(B) Fungi usually show haplontic life cycle

(C)Pyrenoids are storage bodies in algae, in which starchy core is surrounded by proteinaceous
sheath

(D)Sporangiospores and conidia are endogenous and exogenous in origin respectively
How many of the above statements is/are correct?
(1) Four
(2) Two
(3) One
(4) Three​

Answer 1

Answer:

the 3 statements are correct

Answer 2

Answer:

Statements (A), (B), and (D) are correct.

Explanation:

• Plasmogamy is a step in the sexual reproduction of fungi where the protoplasm of two parent cells (often from the mycelia) fuses without the fusion of nuclei, bringing two haploid nuclei very close to one another in the same cell.
• Protists and the majority of the fungus family also exhibit them. Haploid spores are created during the meiosis process in the zygote. These spores divide to form gametophytes. The gametophytes are autonomous and vital for photosynthesis.
• One of the enzymes required in photosynthesis for carbon fixation and subsequent sugar generation is ribulose biphosphate carboxylase, and it makes up a major portion of the pyrenoid, a dense structure inside or near chloroplasts of some algae. Around pyrenoids, glucose in the form of starch is frequently observed.
• The asexual, non-motile spores are called conidia. Mitosis is how they are created. Contrary to sporangiospores, conidia do not have a protective sac around them. Conidia are identical haploid cells to their haploid parent. Ascomycetes reproduce asexually by producing conidia, which are carried on conidiophores, which are stalks.

Hence, option (4) is correct.

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