Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

boymone94

  • 2 years ago

Which of the following is UNTRUE about diatoms? A. They are unicellular. B. They attach themselves to algae. C. They have beautiful glasslike cell walls. D. They move by secreting ooze and sliding through it.

  • This Question is Open
  1. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Which choices can you eliminate - what do you already know about diatoms?

  2. boymone94
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I can eliminate B or C??

  3. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay great! So you have A and D left.

  4. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Diatoms, most of the time, ARE unicellular protists so that should point you to the correct answer.

  5. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It's impossible to know everything about diatoms of course, so maybe you can't say that they definitely don't ooze and slide - but by applying some basic informatino that you do know (unicellular, algae, silica walls, live in the ocean) you can eliminate the unfamiliar answer choices.

  6. Lime
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Diatoms are definitely unicellular. I agree with Kma, however, C sounds more like an opinion than a true fact. That would most likely be the untrue answer. Diatoms attach themselves to other algae and they may secrete a substance to move about. There are scientific studies of large deposits of siliceous diatom ooze.

  7. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Hm that's a good point. C did sound kind of fishy ("beautiful" is most definitely subjective) but C seemed safer to me. I have no information about D, but intuitively, it doesn't seem likely because diatoms are generally free-floating in the ocean, right? That mode of movement doesn't seem to suit their lifestyle. From a test question perspective though, I can't imagine a test writer justifying C as the correct answer on a technicality - "the word beautiful is too subjective!" that would be pretty evil haha. Just my two cents, though.

  8. agreene
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Ive always found diatoms to be beautiful... as for the glass bit... not exactly, they are silica mostly. http://www.daviddarling.info/images/diatoms.jpg But yeah id go with C... mostly based on the subjective nature and the fact that they arent glass--but share the common element.

  9. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Update: after much searching, I've learned that diatoms can indeed move through ooze! Crazy, huh. Tough question! "They are non-motile, or capable of only limited movement along a substrate by secretion of mucilaginous material along a slit-like groove or channel called a raphe." http://www.ucl.ac.uk/GeolSci/micropal/diatom.html

  10. Lime
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    If anyone is interested, I've attached a pdf file focused on the types of oozes formed from diatoms. And great find! @Kma230

    1 Attachment
  11. kma230
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Very interesting article; thanks for attaching it.

  12. Stardust_21
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    id go with C

  13. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.