I learned that the phylum Annelids can consist of many creatures such as earthworms, leeches, and scale worms can adapt to a variety of environments. Annelids’ bodies are divided into segments which are seen as rings by the naked eye. They have muscles which help them move by contracting their longitudinal and circular muscles. When Annelids take in food, the food particles travel through one end of the body and are excreted out the other side. The video enhanced my understanding about Annelids because without seeing different species and what classified them as Annelids I would have never known an earthworm or a leech fell into that phylum.
1) What are the ...view middle of the document...
c. Moon snail
d. All of the above
Answer: D, all of the above
2) All of the following are characteristics of mollusks except that they have
a. a pseudocoleomate body plan
b. digestive tract
c. bilateral symmetry
Answer: A, pseudo coelomate body plan
Echinoderms have a 5 part symmetry that makes up their bodies. They pump water into their 5 radical canals allowing them to move. Echinoderms don’t have eyes; therefore they have light sensing organs and can smell their way to find food. Some echinoderms such as sea stars have bony platelets that make up their skeletons. This video enhanced my learning because I was able to see how echinoderms move and how they adapt to their environments.
1) What evolutionary development first appeared in echinoderms?
a. Radial symmetry
b. Bilateral symmetry
c. Digestive tract
Answer: D, endoskeleton
2) Most reproduction in the phylum echinoderms is?
a. They’re hermaphrodites
d. They don’t reproduce
Answer: C. they reproduce sexually and externally
Cnidarians were the first species to have muscles and nerves to produce behavior; they were also the first to have a mouth and a stomach to digest food. Each Cnidarian has a different way of living and they have various body shapes/sizes. All Cnidarians have tentacles with stinging cells in their tips which are used to capture and pacify prey. This video enhanced my understanding of Cnidarians because I had the chance to see them catch their prey and learned interesting facts about the different Cnidarians such as jellyfish.
1) Which Cnidarian can detach from a rock to swim away from predators?
b. Stompia, an anemone
c. A Praya
Answer: B, Stompia, and anemone
2) How many sets of muscles do Cnidarians use to move?
Answer: C, Cnidarians have 2 sets of muscles that they use to help them move.
Platyhelminthes or flatworms were the first hunters and can be found in oceans, freshwater, on land, and inside other animals. They were also the first to develop a central nervous system with a head and a brain. They are bilateral creatures and hermaphrodites. This video enhanced my understanding about flatworms because I didn’t know that species could really be a hermaphrodite and still be able to reproduce. The video showed how they attack their mate to reproduce and I found that utterly interesting.
1) How do Platyhelminthes reproduce?
b. They’re hermaphrodites
c. Lay eggs for male to fertilize
Answer: B, they’re hermaphrodites
2) What is the mouth called on a flatworm?
c. Food sucker
Answer: A, Pharynx
Sponges were the first animals on Earth; they have no brain, no nervous system, and are filter feeders. They are continuously reinventing themselves and not soft because they are made of collagen. Sponges have microscopic...