It is called Blind. That what we were told in biostatistics
The hypothesis devised in this study by the researcher is –
" White fly nymphs escape predation because of their translucent bodies."
In order to test this hypothesis, the researcher is required to conduct an experiment where two sets of white fly nymphs are formed and fed to their predators. The two set of subjects would be -
Set I – White fly nymphs with translucent bodies
Set II- White fly nymphs with translucent bodies coated with harmless dyes.
The number of predated flies in each set can be compared to deduce justification for assumed hypothesis.
Hence, option B is correct
The pathogen is defined as a biological agent that causes disease. The number and types of pathogens that affect garden plants, can instill a constant fear. They include almost all of the biological spectrum. Their action may be temporary as in the case of biting insects, or permanent, as in viral infection. The human body is a favorable environment for the functioning and reproduction of pathogenic organisms, which include viruses, bacteria, protozoa pathogens, and others. Most of them can not survive for long outside the human body, but it is a short period of time is sufficient for entering them into the body of a new host .
