1 / 16

Earthworm vs. Clam

Explore the sexual reproduction and lifecycle of Earthworms and Clams. Learn about their unique characteristics and differences in adapting to their environments. Discover how they care for their offspring in contrasting ways. Thank you for watching!

nickym
Download Presentation

Earthworm vs. Clam

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Earthworm vs. Clam Science E06 By: Adel Dairbekova

  2. Earthworm vs. Clam

  3. Earthworm Earthwormsreproducesexually. Earthwormsarebisexualorhermaphroditic (theyposesbothmaleandfemalereproductiveorgans). Earthwormscannotproduceoffspingsalonebecauseitwouldeffectthegeneticvariability.

  4. Earthworm Smoothmuscleisformed from oneofthethreeprimarytypesoftissuethatoriginateearly in thedevelopmentofanembryo. Itisnotundervoluntarycontrolandrespondstovarioushormonesandneurotransmitters.

  5. Earthworm Anearthwormlaysabatchofeggsatonetime. Theydonotspendtimeraisingtheiryoungoncetheyarehatched.

  6. Earthworm As soonasthebabywormshatch, theyareonlyaboutahalfaninchlongandtheyarewhite in color.  Wormsdonotnurturetheiryoungandassoonasthebabywormsareborn, theywillstarteating.  In aboutfourtosixweeks, theentirelifecyclewillstartoveragain. Itdoesnottakelongforthebabywormtogrowintoafulladult. 

  7. Earthworms

  8. Clam Clamsreproducesexually. Amaleclamreleaseshisspermintothewateratthesametimethatafemaleclamreleaseshereggsintothewater.

  9. Clam Fertilizationtakesplace in thewatercolumnasspermandeggunite. Asthefertilizedeggdevelopsthecellsdivideandtheembryogrows. Astheembryogrows, the next stageisaballofcellscalledthemorula.

  10. Clam Theyoungclamgoesthroughalarvalstagewhereitiscarriedbywavesandcurrents.

  11. Clam Eventuallyitdevelopsashellandsinkstothebottom. Usingitsmuscularfoot, itcanthenmoveaboutthebottomtosomedegree. Atthispoint in theprocess, youmayobserveawhite, frostlikecoatingofyoungclamsalongtidalflats in areaswherespawningtookplace. Asinglehandfulofthiswhitemixturewouldcontainthousandsoftinyclams. Mostclamswe find eachyear.

  12. Clams

  13. Similarities • They are invertebrates • They reproduce sexually • Their body structure isn’t big

  14. Differences • They have different adaptions • They have different ways of living • The way their embryo develops id different • They way they take care of their children is different

  15. Earthworm vs. Clam

  16. The End Thank you for watching!

More Related