Examlex
Which of the following types of reproductive barriers separates two species of sea cucumbers whose sperm and eggs often bump into each other but do not cross-fertilize because of incompatible proteins on their surfaces?
Genetically Altered
An organism or cell with deliberate modifications in its DNA, often to introduce or change specific characteristics.
Defective Genes
Genes that have mutations or alterations leading to various genetic disorders or conditions.
Euthanasia
The act of deliberately ending a person's life to relieve suffering, often debated for moral, ethical, and legal issues.
Killing
The act of causing death, whether intentionally or unintentionally, of a living organism.
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