PHYLA CHART: https://docs.google.com/spreadsheets/d/13iP7U8xOB4llyDAmNtZR-2nexV8582HPxGxaf1Fc3m0/edit#gid=0
Jellyfish: |
There are many differences between the phylum Cnidaria (which includes jellyfish and polyps) and the phylum Porifera (which includes sponges). First of all, jellyfish have organs, while sponges do not. Jellyfish have gonads and a digestive system, while sponges do not. Second, jellyfish have arms and tentacles to help them move. Third, jellyfish have 2 stages to their lives, while sponges only have 1 stage.
Squid:
Squids are much more advanced than sponges or jellyfish. First of all, squids have specialized cells for certain tasks. For example, squids have cromatophores in their skin, which are cells that help them change color. Second, they have a much more complicated body plan. Squids actually have cephaliziation, which means they have a separate head region. neither sponges nor jellyfish have cephalization. Third, they have fully fledged organs (as can be seen by the picture above and to the right). While the sponge and jellyfish only have partially formed systems, squids have eyes, a heart, an inc sac, a mouth, a digestive system, and many more organs. In conclusion, squids are more advanced than any other creature we have dissected before.
Earthworm:
The earthworm we dissected is much more advanced than the sponge or jellyfish before it. Firstly, this earthworm is segmented, while sponges and jellyfish are not. Secondly, earthworms have more fully-fledged organs. Similar to the squid, the earthworm has solid organs that do various tasks, while the other two creatures do not. Third, they have a bilateral body plan. Earthworms have symmetry across their bodies, while the jellyfish had radial symmetry, and the sponge had no symmetry.
Grasshopper:
This grasshopper is more complex than any animal we've dissected thus far. Firstly, they have specialized tissues, such as their outer membrane. Secondly, they have a complex mouth with mandibles. Third, they have more specialized organs. They even have wings that they use to fly. conclusion, grasshoppers are more complex then the sponge, jellyfish, or earthworm.
Perch:
ANSWERS TO THE QUESTIONS:
1: The perch is streamlined and flat, which would help it cut through the water.
2: The gill rakers might keep the gills clean, so the fish can breathe.
3: We don't have a live fish. I will ignore this question.
4: The perch's scales face backwards, making the fish smooth and more aqua-dynamic.
5: It has two nostrils; this is the same as humans.
6: The gills filter water through them and remove the air efficiently.
7:The lateral line helps keep the perch oriented.
PARAGRAPH:
The perch was more complex than almost all the other creatures we dissected. The perch had specialized organs, like many of the creatures, but it also had some extra organs, such as the bladder it uses to raise and lower itself in the water. It also had a full skeletal system. This system helps keep the perch from collapsing in on itself. Lastly, the perch has a complex system of movement. They have 7 different fins, which, along with the swim bladder mentioned earlier, allows it to skillfully maneuver in the water.
1: The perch is streamlined and flat, which would help it cut through the water.
2: The gill rakers might keep the gills clean, so the fish can breathe.
3: We don't have a live fish. I will ignore this question.
4: The perch's scales face backwards, making the fish smooth and more aqua-dynamic.
5: It has two nostrils; this is the same as humans.
6: The gills filter water through them and remove the air efficiently.
7:The lateral line helps keep the perch oriented.
PARAGRAPH:
The perch was more complex than almost all the other creatures we dissected. The perch had specialized organs, like many of the creatures, but it also had some extra organs, such as the bladder it uses to raise and lower itself in the water. It also had a full skeletal system. This system helps keep the perch from collapsing in on itself. Lastly, the perch has a complex system of movement. They have 7 different fins, which, along with the swim bladder mentioned earlier, allows it to skillfully maneuver in the water.
Frog:
Frogs have many more complex features then the creatures we previously dissected.
Firstly, frogs have specialized organs, which is an upgrade from sponges and jellyfish, which did not have specialized organs.
Secondly, they have a digestive system very similar to our own, with small and large intestines.
Third, they have male and female reproductive organs.
Firstly, frogs have specialized organs, which is an upgrade from sponges and jellyfish, which did not have specialized organs.
Secondly, they have a digestive system very similar to our own, with small and large intestines.
Third, they have male and female reproductive organs.