Actin is one of the most abundant proteins in eukaryotes, where it is found throughout the cytoplasm. Its amino acid sequence is one
of the most highly conserved of the proteins as it has changed
very little over the course of evolution, differing by no more than
20% in species as diverse as algae and humans. Actin contributes
to processes such as intracellular transport of vesicles and
organelles, muscular contractions, cellular migration, and gene
expression. What two steps combine to form actin through the
process of protein synthesis?

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

p

explanation:

the answer is d p: cell, q: organ, r: organ system, s: tissue