"The alternative—in vitro toxicity testing—involves tests conducted on cultured bacteria or mammalian cells in a lab."
Answer: True
Explanation: In order to do a research on any topic, the first step is to establish the significance of the study, since making this statement is the basis of any proper investigation. It allows the writer to approach the purpose accurately and have high-quality knowledge in the field, avoiding then, any possible confusion or misleading of the topic.
Answer:
The opposite of hindwings is front wings (for butterflies) and can also be used to dodge predators.
Explanation: