Q.8 - Biology

Question

The life cycles of perfect fungi are most similar to which other organism? 

a. Hydra that undergo asexual budding 

b. Diploid-dominant pea plants 

c. Haploid-dominant green algae 

d. Bacteria undergoing binary fission 

Step-by-Step Solution

Answer

The correct answer is (c) Haploid-dominant green algae  

Step1. Introduction

In the life cycle of a sexually reproducing fungus, a haploid phase alternates with a diploid phase. The haploid phase ends with nuclear fusion, and the diploid phase begins with the formation of the zygote. 

Haploid-dominant: a life-cycle type in which the multicellular haploid stage is prevalent. 

Step2. Explanation of the correct answer

(c) Haploid-dominant green algae  

Haploid life cycle is the most common in fungi (with dikaryotic phase). 

Most fungi and some protists (unicellular eukaryotes) have a haploid-dominant life cycle, in which the “body” of the organism—that is, the mature, ecologically important form—is haploid. 

Step3. Explanation for Incorrect Options

a. Hydra that undergo asexual budding 

Hydra can reproduce asexually by budding and fragmentation. During budding an outgrowth is formed called as bud which develops into an adult and detached from the main body once get maturity. During fragmentation, the body divides into two parts with subsequent regeneration. 

b. Diploid-dominant pea plants 

Diploid-dominant: a life-cycle type in which the multicellular diploid stage is prevalent. 

d. Bacteria undergoing binary fission 

Bacterial binary fission is the process that bacteria use to carry out cell division. Binary fission is similar in concept to the mitosis that happens in multicellular organisms.