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Structures Of Life By Jason

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Room 207isb

on 27 March 2013

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Transcript of Structures Of Life By Jason

Structures Of Life By Jason Crayfish Snails Parts of Snails Feeding a Crayfish Parts of a Crayfish Plants Seeds And Plants C. Figure F shows a crayfish eating its food, elodea (Figure G). They can also eat the tiny black specks of food that you see in the image. It looks like poop but this food can also be given to lobsters and crawfish. A plant is a living organism. A plant starts from a seed. When the seed is resting we call it dormant. Seeds can be dormant when they are not growing. Seeds develop in the fruit of a plant. The cycle of a plant begins as a seed, then it is becomes the roots, then grows a little stem, the seed coat falls off, and the cotyledon opens. Little leaves grow and the plant grows taller. Then, the cotyledon falls off. It continues growing and then a bud shows. The bud begins to open, it is fully opened, and it becomes a flower. Mold can appear on your plant if it is wet while it is processing. Nutrients are the essential chemicals healthy plants need. Growing plants in water and nutrients is called hydroponics. Seeds Figure A shows the dormant seeds almost ready to crack. This period is called germination. The dark coloring is called the seed coat.
Figure B shows plants after two weeks, stems have begun to grow, cotyledons have opened and some even have little leaves. Credits Seeds & Plants
A. CC image by Isbes- http://www.flickr.com/photos/isbes/8430449871/in/set- 72157631432863480
B. CC image by Isbes- http://www.flickr.com/photos/isbes/8430446431/in/set-72157631432863480/lightbox/
C. CC image by HappySleepy- http://farm3.static.flickr.com/2452/3865061427_ed899bff85.jpg
D. CC image by Leach84- http://www.flickr.com/photos/arleach84/6830683082/lightbox/

Crayfish
E. CC image by morberg- http://www.flickr.com/photos/18271014@N00/3887659462/
F. CC image by Isbes- http://www.flickr.com/photos/isbes/8494637996/sizes/m/in/set-72157631432863480/
G. CC image by biologycorner- http://www.flickr.com/photos/40964293@N07/3920527577/

Snails
H. CC image by Isbes- http://www.flickr.com/photos/isbes/8559061014/
Video: Land Snails Observation 1 YouTube Video by room207isb A B D. In Figure D there are many plants growing successfully. Snails are mollusks which are animals with a muscular foot. Snails fit into the category called gastropods. Snails must be supplied with food, water, air, and space in their habitat. Crayfish have two eyes, six antennae, one tail flap, spinnerets, 8 walking legs, 2 mouth parts, lots of bristles and they have no ears. They also have shells for protection. The scientific name for the shell is carapace. They have pincers for fighting and sometimes they do fight when you try to pick them up. Crayfish are crustaceans. Crustaceans have a shell that keeps on molting over their age of time. Most crayfish only live three to eight years and at two weeks they leave their mother and at 14 weeks they are at their full adult size. There is no way to tell if a crayfish is male or female, only that a female crayfish has long spinnerets. A male has shorter spinnerets than the female. The female spinnerets are very long for holding eggs. The female crayfish sometimes eat their eggs because they are hungry. Crayfish eat green food that gives them oxygen and it is called elodea. They make very big homes. Their homes can be three feet long. They live in freshwater rivers and they also don't live in very deep waters because they are small animals and they need air. So they don't have the oxygen food so they have to go to the surface, which means they need to live in shallow waters because they aren't very good swimmers. Also, they aren't very good walkers, they like walking in the water on the ground, like on the bottom of a river. They like to be there because they have a very good grip on the floor, but they aren't very good on tables. Crayfish can be blue, dark red, very light orange, orange or just plain red. Their food doesn't affect their color. They can't stay out of the water for more than two minutes. If they do, they are very lucky crayfish! Once they are one to weeks old they usually mark their territory. They like to live by themselves and eat alone. Young crayfish hide behind their mother for protection. F. E. G. Figure C shows a young plant and an older plant. The older plant is taller than the younger one. This is a video of a land snail out of it's shell moving on a blank piece of paper. You can see most of its body parts. To have the snail come out of its shell we had to be very quiet because they have ears. So when it's loud they huddle into their shell. Snails have a shell, muscular foot, 4 antennae, no legs, and a tongue with teeth on it. It has two eyes. Its eyes are on the first 2 antennae. Snails have ears and they can estivate when they don't have enough food or water. This means they seal the opening of their shell. Snails have mucus that lets them run smoothly across what they are moving against. Figure H shows two moving snails going after food, a little piece of lettuce. H.
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