Which groups show sexual and asexual reproduction?

Which groups show sexual and asexual reproduction?

• A. Nematoda and Rotifera
• B. Nematoda only
• C. Rotifera only
• D. Neither

Answer: (A)

Two ways living things reproduce: sexually, mixing genetic material from two individuals, and asexually, making copies of themselves. Some groups can do both, adjusting to environmental conditions or life stages. Nematodes often have distinct males and females and reproduce sexually, but there are lineages that can reproduce without fertilization (parthenogenesis) or self-fertilize in hermaphroditic forms. This shows that nematodes can use either method depending on circumstances. Rotifers primarily arise from parthenogenesis, producing offspring without fertilization, yet many rotifer species also engage in sexual reproduction when conditions favor genetic recombination. Because rotifers include species that use both strategies, they, too, exhibit both reproductive modes. Since both groups include species that employ sexual and asexual reproduction, they are both capable of showing these two reproductive strategies.

Two ways living things reproduce: sexually, mixing genetic material from two individuals, and asexually, making copies of themselves. Some groups can do both, adjusting to environmental conditions or life stages.

Nematodes often have distinct males and females and reproduce sexually, but there are lineages that can reproduce without fertilization (parthenogenesis) or self-fertilize in hermaphroditic forms. This shows that nematodes can use either method depending on circumstances.

Rotifers primarily arise from parthenogenesis, producing offspring without fertilization, yet many rotifer species also engage in sexual reproduction when conditions favor genetic recombination. Because rotifers include species that use both strategies, they, too, exhibit both reproductive modes.

Since both groups include species that employ sexual and asexual reproduction, they are both capable of showing these two reproductive strategies.