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asexual

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Secondary Information

Definition

Asexual reproduction is a type of reproduction that does not involve the fusion of gametes. This means that there is no exchange of genetic material between two individuals.

Asexual reproduction is common in many different organisms, including bacteria, plants, and some animals.

There are many different types of asexual reproduction, but some of the most common include:

  • Binary fission: This is the type of asexual reproduction that bacteria use. In binary fission, a single cell divides into two identical daughter cells.
  • Budding: This type of asexual reproduction is common in yeasts and some other fungi. In budding, a small bud forms on the side of a parent cell. The bud eventually separates from the parent cell and becomes a new individual.
  • Fragmentation: This type of asexual reproduction is common in some plants. In fragmentation, a plant breaks into pieces, and each piece can grow into a new individual.

Asexual reproduction is a simple and efficient way to reproduce. It is also a way to reproduce quickly, which can be important in environments where resources are limited.

How can the word be used?

I'm propagating my strawberry plants asexually by dividing them.

asexual

Different forms of the word

Adjective: asexual.

Noun: asexual person, asexual being.

Verb: to reproduce asexually.

Adverb: asexually.

Etymology

The word "asexual" comes from the Latin word "asexualis," which means "without sex." The Latin word "asexualis" is derived from the prefix "a-" (meaning "without") and the noun "sexus" (meaning "sex").

Question

What plants reproduce asexually?

AQA Science Exam Question and Answer

Question:

Define the term "asexual" in the context of reproduction and provide an example of an organism that reproduces asexually. Describe the advantages and disadvantages of asexual reproduction.

Answer:

  • Asexual reproduction is a type of reproduction where offspring are produced without the involvement of gametes (sex cells) or the combination of genetic material from two parents. One example of an organism that reproduces asexually is the common dandelion, which produces seeds without the need for pollination or fertilisation.

Advantages of Asexual Reproduction:

  • Rapid Reproduction: Asexual reproduction allows for rapid population growth since no time is spent finding and attracting mates.
  • Consistency: Offspring are genetically identical to the parent, maintaining beneficial traits in the population.
  • Efficient: Asexual reproduction can be energy-efficient as it doesn't require the production of specialised reproductive structures or behaviours.

Disadvantages of Asexual Reproduction:

  • Lack of Genetic Diversity: Since there is no genetic variation among offspring, asexual populations may be more vulnerable to environmental changes or diseases.
  • Limited Adaptability: Asexual reproduction may hinder adaptation to changing environments, as there is no genetic recombination to produce new traits.
  • Accumulation of Mutations: Harmful mutations can accumulate and spread rapidly through asexual populations, potentially leading to reduced fitness or survival.