No but they are considered protected
Answer:
Jaws and a swimming bladder
Explanation:
A defining characteristic between sharks and rays that distinguish them from ray-finned fish is the *possession of jaws in sharks* and rays;and the *possession of swimming bladder in ray-finned fishes*.
Characteristics of sharks and rays are as follows :
They are cartiiliginous fishes; they possess *strong jaws* lined with teeth; body dorsoventrally flattened, fusiform (spindle shaped) with heterocercal tail(diphycercal in Chimaeras); paired fins; *no swimming bladder or lungs*; pelvic fins in males often modified to form clappers; Gill arches internal to gills; reduced notchord; lateral-line system; paired nostrils; internal nares absent; separate sexes; internal fertilization and direct development; oviparous, oviparous, or ovoviviparous. Examples include, Spiny dog fish or dog shark, Ray Raja, Chimaera.
Characteristics of ray-finned fishses:
They generally lack paired fins; no internal nares; *air sacks usually function as swimming bladder*; skeleton usually well ossified. Blind olfactory sacs (do not open into the mouth); Tail homocercal. Examples include Tilapia, Claris,and Polypterus.
Fiber is made out of cellulose. Our body doesn't synthesize an enzyme that digests cellulose(cellulase) that's why we can't metabolize it. fiber is good because it reaches the colon undigested and helps the intestinal fauna and can even prevent colon cancer
Answer:
The importance of Forests
Explanation:
Forests is important because it is the first and foremost means to effective climatic change which w all depend upon. It also provides us with enormous amount of food and oxygen for survival.
This leads to the importance of forest conservation effort towards sustaining the climate again changes that are harmful to human existence. It also explains the need to conserve the forest as source of fuel, food and medicine among others.
Some of the particular threats to forest in my areas include excess deforestation and the governments effort to plant a tree advocacy and other forms of re-orientation programmes to educate people against consistent hunting that reduces forest life.
They are both relatively strong bonds. however, hydrogen bonding is more stronger then ionic bonds and the h only bonds with the "f o n" elements. Ionic bods on the other hand are bonds between a metal element and a non metal element.
