Question

Why do algae and fungi shift to a sexual mode of reproduction just before the onset of adverse conditions?

Answer 1

Hint: Sexual reproduction is a type of reproduction that involves a complex life cycle in which gametes such as sperm or eggs with a single set of chromosome haploid combine with another to produce an organism composed of cells with two sets of chromosome diploid.

Complete answer:
> Sexual reproduction involves two parents and two types of gametes.
> The gametes fuse to another to form the offspring.
> Sexual reproduction can bring variation in organisms which can help to get through adverse conditions.
> So, organisms like fungi and algae switch to a sexual mode of reproduction just before the onset of adverse conditions to tolerate that adverse condition.

Additional information:
> Sexual reproduction is the most common life cycle in higher plants and animals or eukaryotes mostly multicellular.
> In the production of sex cells in eukaryotes, diploid mother cells divide to produce haploid cells known as gametes in the process called meiosis that involves genetic recombination.
> The two haploid gametes combined into one diploid cell known as a zygote and the process is known as fertilization.
> Sexual reproduction due to the combination of gametes produces variation among organisms and has a significant role in evolution.
> In plants the diploid phase known as sporophyte produces spores by meiosis that germinate and then divide by mitosis to form haploid multicellular phase, the gametophyte then produces gamete directly by mitosis.

Note: Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in a number of chromosomes the offspring that arise by asexual from a single cell or from a multicellular organism inherit the genes of that parents.