Pahoehoe. Pahoehoe is the second most abundant type of lava flow. Pahoehoe lava is characterized by a smooth, billowy, or ropy surface. Pahoehoe flows tend to be relatively thin, from a few inches to a few feet thick.In map-view the flows tend to be narrow and elongate.ther types of lavas include block lava, which has a surface of large angular blocks, and rhyolite lava. These two types are associated with lava chemistries other than basalt.
The major component of the bacterial genome is one double-stranded, circular DNA molecule.. Source: Biology, Sixth Edition Campbell and Reece.eptidoglycan is a polymer of interlocking chains called monomers. The b â¦ ackbone molecule is composed of two glucose derivatives (amino sugars) abbreviated NAM and NAG which are connected by interpeptide bridges.
The term âgenomeâ can also be applied to refer to specific genetic contents. For example, the total content of the nuclear DNA in a cell is called ânuclear genomeâ and the total DNA content in mitochondria is called âmitochondrial genomeâ.In addition, genome may also comprise of non-chromosomal genetic elements such as viruses, plasmids and transposable elements. Gene is a segment or a portion of DNA molecule while genome is the total DNA content in a cell. â¢ Genes code for proteins. Genome itself cannot code for proteins as it contains almost all the DNA. Since the gene is only a portion of a DNA molecule, that part is enough to code for proteins.