Chapter 20.2, Problem 6MI

Summary Introduction

To write: 

The correct vocabulary term to each definition.

Introduction:

Zygomycetes is a small group in the fungi kingdom which can reproduces asexually and sexually. They reproduce asexually by producing sporangiospores during favourable environmental conditions and reproduce sexually by conjugation when environmental conditions is unfavourable.

Answer to Problem 6MI

The Sequence of events by which zygomycetes reproduce sexually is given in a table below the graphic organizer.

  

Explanation of Solution

Two opposing mating strains one (+) and one (−) come be in close to each other and forms gametangium from the mating hyphae having haploid nucleus. The two gamemtagia fuse and the haploid nuclei from each gametangium fuse to form a diploid zygote. The zygote develops a thick wall and becomes a dormant zygospores. They remain dormant until environmental conditions become favorable. When the zygospore germinates, it undergoes meiosis and produces haploid spores, which will, in turn, grow into a new organism. This form of sexual reproduction called conjugation.