How did mendeleev arrange the known elements in his periodic table?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Which of the following describes a situation where competition between producers exists