Question 1 (1 point) Which of the following is FALSE? 0 The two main steps in hierarchical polythetic agglomerative clustering are (i) forming a distance (dissimilarity) matrix or similarity matrix, and (ii) applying a sorting strategy to the matrix to form a dendrogram. Q It is invalid to use Euclidean distance as a dissimilarity measure with data on the abundance of functional groups of organisms. Q It is usually sensible to combine cluster analysis with an ordination of the same data set. 0 Different sorting strategies applied to the same dissimilarity matrix can yield quite different dendrograms. 0 All of the above are FALSE. Which of the following is TRUE? 0 Once a dendrogram is produced in cluster analysis, it is somewhat arbitrary to determine how many clusters occur and where they lie. 0 Cluster analysis will produce clusters from data where clusters don't really exist, tag. in situations where there is a gradual change in species' abundances in response to a continuous environmental gradient. 0 Nearest-neighbour or single linkage clustering is often not very useful because it commonly produces the so-called 'chaining effect'. 0 The Bray-Curtis measure is often the appropriate dissimilarity measure to apply to species abundance data because it is not influenced by 0-0 matches, i.e. situations where a species is absent from a pair of samples. 0 All of the above are true