21. Its walls were again pockmarked by bits of metal packed into the bomb to increase its lethal effect . 22. The EPA's testing requirements do not account for sub-lethal effects to bees or effects on brood or larvae. 23. The bomb included metal fragments packed around the explosive core, that sprayed around the restaurant, maximizing lethal effect . 24. Fentanol is an anesthetic commonly used in hospitals, but special measures need to be taken to prevent lethal effects . 25. A dose of the last batch which produced no toxic effects may produce lethal effects in the next batch. 26. The Predator that the CIA used to lethal effect in Afghanistan and Yemen costs just under $ 1 million. 27. It does not always have a lethal effect on large predators, such as sharks, but it can kill humans. 28. The 18th-century naturalist Dr . Leigh recorded its lethal effects after the death of a farmer's wife and child. 29. The first published report that blue-green algae or cyanobacteria could have lethal effects appeared in " Nature " in 1878. 30. In addition to being an incomplete dominant gene, the " hairless " gene has a prenatal lethal effect when homozygous.