生物和英语好的进 create a chart that is divided into 4 sectionsSpongesCnidariansFlatwormsRoungwormsEach section MUST contain at least 10 characteristics for each of the above animals.Sections 2,3 and 4 must list the major evolutionary change(

生物和英语好的进 create a chart that is divided into 4 sectionsSpongesCnidariansFlatwormsRoungwormsEach section MUST contain at least 10 characteristics for each of the above animals.Sections 2,3 and 4 must list the major evolutionary change(
生物和英语好的进
create a chart that is divided into 4 sections
Sponges
Cnidarians
Flatworms
Roungworms
Each section MUST contain at least 10 characteristics for each of the above animals.
Sections 2,3 and 4 must list the major evolutionary change(s) that makes it more well-developed than the phylum below it.
以上是原本的问题
请问 它们的什麼变化对进化起好作用

生物和英语好的进 create a chart that is divided into 4 sectionsSpongesCnidariansFlatwormsRoungwormsEach section MUST contain at least 10 characteristics for each of the above animals.Sections 2,3 and 4 must list the major evolutionary change(
section 1:Sponges :sponges live all over the world in water – attach themselves to hard
surfaces – currents move food and oxygen to them – resemble plants but do take in food (filter feeders) – as water passes through the
sponge they take out the tiny organisms like bacteria and protists - bodies are usually irregular with no symmetry– sponges lack the tissue and organs of most animals – holes of a sponge are pores – receive oxygen from diffusion – diffusion also carries away waste products – body of sponges have sharp,needlelike spikes to support its frame and protection – some sponges also have
irritating substances for protection- reproduce both sexually (fertilzation) and asexually (budding) – sponges are neither male nor female – produce both sperm and eggs at different times of the year – when they release sperm it travels in the water into the pores of egg producing sponges –after fertilization a larva develops and attaches to a hard surface
section 2:Cnidarians :include jellyfish,sea anemones,and coral -Have the ability to sting and take their food into a hollow cavity
-Have musclelike tissue and nervous system -different body plans(Polyp & Medusa) but both with radial symmetry-Feed by injecting venom into prey (stinging) – use tentacles to pull
prey towards the cnidarian’s mouth – food put into the body cavity –waste is expelled through the mouth
-Reproduce sexually or asexually depending on the organism – allows the cnidarians to reproduce rapidly – some species are both sexes and some are only one
section 3:Flatworms
-All worms are invertebrates,have long narrow bodies,no legs,bilateral symmetry – have a brain – some are male or female while
others are both – the worms with both sex organs do not usually fertilize its own eggs but instead transfer sperm to one another –
many can reproduce asexually by breaking apart with each part becoming a new worm – earthworms can not but you can cut off their
tail and can then grow a new one = regeneration
-ex.Planarians,flukes,and tapeworms – can be as tall as 10 to 12 meters but most are too small to be seen – most are parasites that
obtain food from their hosts
Tapeworms = parasitic that absorbs food from the digestive system – can live in humans – many live in more than one host at different times of their life
Planarians = nonparasitic (no host) – scavengers feed on dead or decaying material but will feed on animals smaller than them – can not see – use smell to find food – feeds like a vacuum – inserts a feeding tube into its food releasing digestive juices to digest the food outside of their body – next they suck up the food into the central cavity – undigested food exits out digestive tube
section 4:Roundworms:
-live in moist environments (sand,soil,etc) – tiny and hard to see but one of most abundant animals on earth – some are carnivores,
herbivores,or parasites – have a digestive system that has one opening and an ending (two holes) – food enters the mouth and goes out the anus – allows more energy to be absorbed
I can provide a ppt if you need.Just leave me your e-mail.