An arid environment is characterized by hot and dry climatic conditions. Plants and animals are adapted to survive in this harsh conditions. Rainfall is minimal to intermittent.
In arid environment, the climatic weathering is very slow because of no to minimal rainfall.
Mechanical or physical weathering most common in an arid environment is THERMAL WEATHERING due to constant increase in temperature.
Protoplasm is the organic substance making up the cell of all living things
C. have structures and molecules that are more similar to eukaryotes than bacteria.
Vertebrates include all the species of subphylum Vertebrata, that is, chordates with vertebrates. With currently about 66000 species, the vertebrates shows the prodigious majority of the phylum Chordata. Vertebrates comprise of jawed vertebrates, like bony fishes and cartilaginous fishes, and jawless fishes.
A vertebrate refers to a species with a backbone. The majority of the vertebrates exhibit bilateral symmetry. Coelomate animals exhibit a body cavity known as coelom with a complete lining known as peritoneum obtained from mesoderm. The majority of the bilateral animals, like all the vertebrates, are coelomates.
Vertebrates show incremental growth, like the incremental lines in the dentine of teeth. The majority of the animals more composite than jellyfish and other Cnidarians are divided into two classes, that is, the deuterostomes and protostomes. The chordates that include all the vertebrates are deuterostomes.
Thus, bilateral symmetry, coelom, incremental growth, and deuterostome development are the innovations found in vertebrates.
Bacteria's cell wall is made of peptidoglycans; among protists Algae have cell walls made of cellulose.
Fungi's cell wall is made up of chitin.
Plants cell wall is made of cellulose.
