Below is the summary of an experiment. Read the summary and then choose which word correctly completes the heading.

Descriptive/Experimental study

The amount of soy products eaten by each participant was assessed at the start of the study. During the 30 years of the study, the women’s incidence of breast cancer was recorded.

Complete the sentence by choosing the correct preposition.

pH is maintained ... 6.5, using Waterlife Buffer and Sera pH Minus.

Read the following extract and choose the form of communication it might come from.

Hi! Has anyone had any experiences with nanoparticles sticking to glassware :-( ? If so, does anyone know if there’s a suitable silylation protocol to pre-treat the glassware to do something about this annoying non-specific adsorption? Thanks!

When we are arguing with someone, we need to use evidence to support our point of view. We can use ‘because’ or ‘because of’ to give a reason or ‘so’ to show a result of a situation. Complete the sentence using because, because of or so.

Root gravitropism influences the plant more than root hydrotropism,  ______________ hydrotropism is difficult to observe in vivo.