GRE Subject Test: Biology : Understanding Fungal Life Cycle and Reproduction

Study concepts, example questions & explanations for GRE Subject Test: Biology

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Example Questions

Example Question #2 : Fungi

Fungi can reproduce in all of the following manners except __________.

Possible Answers:

by binary fission

vegetatively

by sexual spores

by axsexual spores

Correct answer:

by binary fission

Explanation:

Binary fission occurs in prokaryotes and is a form of asexual reproduction. Fungi are considered haploid eukaryotes and undergo reproduction through processes like asexual spore release, vegetative reproduction, and sexual spore release. Asexual spores do not have DNA mixing, while sexual spores do have DNA mixing. Vegetative reproduction is when part of the fungus breaks off and forms a new fungus.

Example Question #2 : Understanding Fungal Life Cycle And Reproduction

The life cycle of most fungi is best described by which of the following statements?

Possible Answers:

Fungi only reproduce asexually

Fungi have both sexual and asexual portions of their life cycle

Fungi are unique and have different mechanisms of reproduction

Fungi only reproduce sexually

None of these

Correct answer:

Fungi have both sexual and asexual portions of their life cycle

Explanation:

Most fungi have a life cycle that consists of both sexual and asexual periods. Spores can be produced sexually or asexually, depending on the availability of male or female gametes. This has provided an advantage to fungi to be able to spread and propagate in a variety of environments.

Example Question #1 : Understanding Fungal Life Cycle And Reproduction

A scientist is interested in genetically engineering a fungus that has a limited reproductive process so that it does not accidentally cross breed with other fungi in the laboratory. Which process should be disrupted to hinder fungal reproduction?

Possible Answers:

None of these

Mycelium formation

Nutrient absorption

Spore formation

Septa formation

Correct answer:

Spore formation

Explanation:

Most fungi reproduce by creating microscopic spores, which are reproductive cells than can be dispersed by wind, water, or animals. Spores can be generated sexually or asexually. If the scientist disrupts spore formation, the fungus will not be able to spread spores to other areas of the laboratory.

Inhibition of spore formation would limit the fungus's ability to reproduce over distance, however fungi have multiple methods of reproduction and would still be able to generate progeny even if spore production is disabled.

Example Question #2 : Understanding Fungal Life Cycle And Reproduction

Which statement is true concerning spores?

Possible Answers:

Neither fungal spores nor bacterial endospores are reproductive structures

Both fungal spores and bacterial endospores are reproductive structures

Fungal spores are reproductive structures, while bacterial endospores are not

Fungi cannot produce spores

Bacterial endospores are reproductive structures, while fungal spores are not

Correct answer:

Fungal spores are reproductive structures, while bacterial endospores are not

Explanation:

Fungal spores are reproductive structures produced by fruiting bodies. They are usually asexual, and are often produced in huge numbers, however, fungal spores can also be sexual. In contrast, bacterial endospores are non-reproductive survival structures that certain bacteria can adopt in order to survive through difficult times.

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