Regulatory proteins control the cell cycle.
If the regulatory proteins are malfunctioning or absent, the cells may reproduce abnormally fast, causing a tumor.
Nematodes have a pseudocoelom and are the simplest animals that have a complete digestive tract.
Nematodes also known as roundworms are animals well adapted to variety of environments, meaning that are ubiquitous. Nematodes are small, bilaterally symmetric with ornamented ring body structures. Their body is covered with cuticle that works with the muscles beneath it to create a hydroskeleton. There are free-living species and parasitic species of Nematoda.
Answer:
The main atmosphere of terrestrial planets is a gaseous mix of carbon dioxide and nitrogen gases and all of terrestrial planets have rocky surfaces. Jovian planets are larger and further from the sun and rotate faster and have more moons,rings, and have less dense cores than terrestrial planets.
