The layers that creates folding or tilting are found in the sedimentary rocks. These rocks are formed due to the compaction and lithification of sediments. For example, sandstone, shale and mudstone.
This rocks when deposited over one another, it forms layers. These layers are then subjected to folding or tilting due to the compressional stress (tectonic forces).
Before forming the layers, if the rock is subjected to compressional stress, then the sediments will not form layers and there occurs no folding. Whereas it will shatter the rock.
Phagocytosis is the process by which cells ingest large particles, including other cells, by enclosing the particles in an extension of the cell membrane and budding off a new vesicle. During pinocytosis, cells take in molecules such as water from the extracellular fluid.
A heterozygous gene is known as having two different alleles of a particular gene or genes. The correct answer is option A because both letters are different, versus the other two options where both are capital or lowercase.