Which of the following is a method of reproduction that generally occurs very rapidly in sexual reproducers?

• A. Binary fission
• B. External fertilization
• C. Budding
• D. Fragmentation

Answer: (B)

Verified step by step guidance

1. Understand the context of the question: The problem is asking about a method of reproduction that occurs rapidly in sexual reproducers. Sexual reproduction involves the combination of genetic material from two parents.
2. Identify the options provided: Binary fission, external fertilization, budding, and fragmentation. Note that binary fission is a form of asexual reproduction, typically seen in prokaryotes like bacteria.
3. Consider external fertilization: This is a method where fertilization occurs outside the organism's body, often in aquatic environments. It can be rapid because many gametes are released into the environment simultaneously, increasing the chances of fertilization.
4. Evaluate budding and fragmentation: Both are forms of asexual reproduction. Budding involves the growth of a new organism from a part of the parent, while fragmentation involves the breaking of the parent into parts that develop into new individuals.
5. Conclude that external fertilization is the correct answer: It is a method of sexual reproduction that can occur rapidly due to the simultaneous release of gametes, unlike the other options which are asexual methods.