The cities, especially the largest ones have almost always been located along the banks of a river, usually a larger one. ... In the past, a major reason was the fertile soil, as the larger population needed more food, and the fertile deposits by the rivers enable high scale production of food. ( cite: google )
Structures in the mouth region of the Annelids vary in a wider range. There are some annelids evolve jaws , which can be used in seizing their victims and preys, biting pieces of vegetation, or grasping decomposing matter. Even though some have evolved their jaws, majority of them are filter feeders. What lacks them that most advanced animals have? they dont have teeth.
The scientists should conclude that other data must be considered in order to make a valid conclusion.
<h3>What is Archaefructus?</h3>
Archaefructus is an extinct genus of herbaceous aquatic seed plants with three known species. Fossil material assigned to this genus originates from the Yixian Formation in northeastern China, originally dated as late Jurassic but now thought to be approximately 125 million years old, or early Cretaceous in age.
Even with its revised age, Archaefructus has been proposed to be one of the earliest known genera of flowering plants.
Because of its age, lack of sepals and petals, and the fact that its reproductive organs (carpels and stamens), are produced on an elongate stem rather than condensed into a flower as in modern angiosperms,
Archaefructaceae has been proposed as a new basal angiosperm family.
An alternative interpretation of the same fossil, however, interprets the elongate stem as an inflorescence rather than a flower, with staminate (male) flowers below and pistillate (female) flower above.
To learn more about Archaefructus: brainly.com/question/28206445
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<span>Separate populations of the species with distinctive profiles, perhaps even the start of speciation, or multiple species descended from the original one.
This is because it's diversifying, with many different traits changing.</span>
The clavicle will ossify first
