Green environmental

Characteristic Of Crab.

About crab....

          Imagine that you are tanning in the sun, and you feel something nibbling at your toes. You look down and see a ton of little red creatures at your feet. You have no clue what they are. Then, you get a closer look at one of them, and you notice they are crabs. You don’t notice one of the crabs has been climbing up your chair. Before you notice it is there, it bites you. 

         A crab is a small sea creature. Crabs live in shells and they don’t move very fast. All crabs have eight walking legs and two claws. There are about 45,000 types crabs that come in many different kind of colors.Some crabs live on land and others live in the water. The crabs that live in the water have paddles on their back legs. This is what makes them able to swim. Crabs that live on land have eight walking legs which are on the backside of the crab’s body make the crab walk either right or left. One side of the 8 back legs helps pull the crab, and the other four stretch out and push. The crab doesn’t move straight forward.

       

   During the first stage, the crab is known as a zoea. The zoea is very tiny and looks a lot like a shrimp. When the crab is a zoea, it is usually about 1 millimeter (1/ 25 inches) long. The zoea usually feeds only on the larvae of oysters and starfish. The zoea starts to shed the outer layer of its shell because it is getting big. This is called molting.During the final stage, the crabs are full grown. The megalops on the crab molts. Then a young crab has all of the body parts that an adult crab has. The hard part that gets made during this process is called a chitin. A chitin is the hard part of the crab also known as a carapace. When the crab grows, the chitin grows with it. The chitin stays with the crab for its whole life.

Characteristic Of Frog.

About Frog...

            The frogs are some of the few remaining members of the amphibia, a group which flourished 250 million years ago. Other present-day members of the group are the toads, newts and salamanders. The amphibia are adapted, in general, to moving, feeding and breathing on land as well as in fresh water. At certain times of their life history or at particular seasons, however, they show a dependence on, or preference for one or the other.

          Frogs have very good eyesight. They bulge out the sides of their heads in order for the frog to see in nearly all directions. Frogs also have amazing sense of hearing. You can often tell the difference between a male and female frog by the size of their eardrum, which can be seen behind their eyes. If the eardrum is smaller than the eye, the frog is a female. On males their eardrum is the same size as the eye. Frogs have very powerful back legs and webbed feet that help them jump great distances, as well as, swim. Frogs even use their legs to dig, or burrow, underground for hibernating. Certain frogs can jump up to 20 times their own body length in a single leap. Every different species of frog has his or her own look. They come in many colors, patterns and sizes.

This is the life cycle of frogs begins with fertilization, thebeggs, the cell spilts, the embryo, the tadpole begin  change to frog..