Answer:
Rotifera- Microscopic animals with distinct head, neck, trunk, and foot
Bryozoa- Have a lophophore for feeding
Arthropoda- Have jointed appendages
Playthelminthes- Vibrantly colored flat-structured worms
Explanation:
The biome that covers most of the central United States, from North
Dakota to Texas, is temperate grasslands. Temperate grassland is the
term used for a larger grouping of biomes that includes within it
tropical savannas. They are defined by a dominance of grasses, and have a
large temperature difference between different parts of the year.
The asthenosphere is the viscous, mechanically weak and ductilely-deformed part of the upper mantle under the lithosphere (crust).
<u>Answer:</u>
The scientists have used the common historical and functional basis of living organisms to create the geological time period.
<u>Explanation:</u>
All the living things present on earth have gone through the evolutionary process. According to the researches, the oldest fossil found on the earth can be traced 3.5 to 3.7 billion years back, and life today on earth has been evolved from a common ancestor through natural selection or adaptions.
The geological time period shows all the changes in living organisms in different eras eons, eras, periods, epochs.
