its D: Without the use of DDT, natural selection would not have favored any mutations that provided protection from pesticides; bed bugs would be more susceptible to today's chemicals.
Sometimes scientists make a mistake, or error, and need to do the experiment again.
The errors can occur at various stages, including experimental design, data collection, analysis, or interpretation.
Recognizing these mistakes and errors is an important part of the scientific process.
Thus, the complete sentence is "Sometimes scientists make a mistake, or error, and need to do the experiment again".
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Complete question.
Complete the sentence.
Sometimes scientists make a mistake, or ___, and need to do the experiment again.
The group of organs in a mollusk is called a 'visceral mass'. It includes the digestive system, respiratory system, circulatory system, and the reproductive system. The mass is enclosed within the mollusk's shell in many species.
The group of organs within a mollusk is called a 'visceral mass'. Mollusks are a group of invertebrates that includes animals such as snails, clams, and squids. The visceral mass, which is surrounded and protected by the animal's shell in many species, includes systems for digestion, circulation, respiration, and reproduction.
The digestive system of a mollusk includes a mouth, stomach, and intestines where food is ingested, broken down, and nutrients are absorbed. The circulatory system is typically open, meaning blood flows freely in cavities within the visceral mass. The respiratory system typically involves a pair of gills where oxygen is absorbed and carbon dioxide expelled.
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