Botânica: O estudo das plantas

Botânica: O estudo das plantas

As briófitas são plantas sem vasos especializados para o transporte de seiva. Elas ocorrem geralmente em ambientes úmidos e abrigados da luz direta. Os organismos fotossintetizantes possuem células que contêm o pigmento verde clorofila.

Na imagem, cinco dessas características estão indicadas por números. Esse tipo de reprodução pode ocorrer de formas diferentes, como por brotamento, em que o broto de uma planta original se desenvolve até se tornar um outro indivíduo. Algumas espécies de pteridófitas apresentam reprodução assexuada através do brotamento. Mas a reprodução sexuada é a mais comum e importante de compreender, é do tipo haplodiplobionte, assim como as Briófitas.

Dizemos que os cloro­plastos estão presentes em células eucarióticas de algas e plantas. Em seu corpo, as células estão organizadas em conjuntos com como cuidar da planta carnívora funções específicas, chamados tecidos. As algas e os fungos multicelulares, que estudamos nas unidades anteriores, não são formados por tecidos.

Resumo completo do Reino Plantae (Vegetal): todas as informações importantes para entender a matéria!

As plantas são seres vivos eucariontes, pluricelulares, com tecidos diferenciados e com nutrição autótrofa fotossintetizante. A imensa maioria é de meio terrestre e incapaz de se deslocar ativamente. As briófitas também são avasculares, por isso não conseguem crescer muito em altura. A difusão de água e nutrientes não é conduzida em vasos fechados, então todo o vegetal deve estar próximo ao solo.

Como se chama o reino das plantas?

Filos do Reino Plantae

Entre as plantas avasculares temos as briófitas (musgos), que também não apresentam semente. Já nas plantas vasculares existem as pteridófitas (samambaias), que não apresentam sementes; as gimnospermas (pinheiros) e as angiospermas (plantas com frutos), ambas com sementes. As plantas vasculares, também chamadas de traqueófitas, possuem vasos condutores de seiva. Dentre os vegetais vasculares há os que possuem sementes e os que não possuem sementes. O ciclo de vida de todas as plantas apresenta alternância de gerações, sendo observadas uma geração multicelular haploide e outra multicelular diploide.

Cólon: o que é, anatomia, função, onde fica

O grupo das Angiospermas é o mais numeroso em espécies distintas. Esse grupo é vascular e possui todas as estruturas reprodutoras (flor, fruto e semente). O ciclo de vida é marcado por alternância de gerações em que a fase gametofítica é a duradoura. Além de estudar mais profundamente esses quatro grupos de planta, daremos ênfase também à ecologia, à anatomia e a fisiologia vegetal. Sendo assim, nesta seção vocês encontrarão uma ampla variedade de temas que suprirão todas as dúvidas a respeito das plantas. O grupo das briófitas é muito importante na formação de uma paisagem.

O grupo das pteridófitas é representado pelas samambaias e pelas avencas. São plantas que não possuem sementes, nem flores e frutos, mas possuem vasos condutores de seiva. As plantas são classificadas em dois grandes grupos dependendo da ausência ou presença de vasos condutores. As plantas avasculares são aquelas que não apresentam vasos condutores enquanto as plantas vasculares apresentam. As briófitas não possuem vasos condutores (xilema e floema) e por isso são chamadas de plantas avasculares.

No seu interior existe água em quantidade suficiente para que haja fecundação. Surge então o zigoto que se desenvolve e forma o embrião de uma nova samambaia, reiniciando o ciclo. As plantas carnívoras ou insetívoras são apresentam uma característica peculiar que atraiu a atenção de muitos cientistas. Elas também realizam a fotossíntese, contudo, por habitarem solos pobres em nutrientes, buscam complementação nutricional por meio da digestão de alguns pequenos animais. Desse modo, contribui para a manutenção da atmosfera terrestre, o que permite a sobrevivência de organismos aeróbicos.

46 comments

  1. I loved as much as you’ll receive carried out right here. The sketch is tasteful, your authored material stylish. nonetheless, you command get bought an nervousness over that you wish be delivering the following. unwell unquestionably come more formerly again since exactly the same nearly a lot often inside case you shield this hike.

  2. Magnificent goods from you, man. I’ve understand your stuff previous to and you are
    just extremely excellent. I really like what you’ve acquired here, certainly like what you
    are stating and the way in which you say it.
    You make it enjoyable and you still care for to keep it wise.
    I can’t wait to read far more from you. This is really a tremendous web site.

  3. When I initially commented I seem to have clicked the -Notify me when new comments are added-
    checkbox and now each time a comment is added I recieve 4 emails with the exact same comment.
    There has to be a way you can remove me from that service?
    Appreciate it!

  4. Hi there, I believe your web site could be having web browser compatibility issues.
    Whenever I look at your site in Safari, it looks fine however, if
    opening in I.E., it’s got some overlapping issues.
    I merely wanted to give you a quick heads up! Other than that, great website!

  5. Just want to say your article is as surprising. The clarity in your post is simply
    nice and i can assume you’re an expert on this subject.
    Fine with your permission let me to grab your RSS feed
    to keep updated with forthcoming post. Thanks a million and please keep up the gratifying work.

  6. I don’t even know how I ended up here, but I thought this post was good.
    I do not know who you are but certainly you’re going to a famous blogger if you aren’t already 😉 Cheers!

  7. Hi, i read your blog occasionally and i own a similar one and i was just
    curious if you get a lot of spam feedback? If so how do you prevent it, any plugin or anything you can suggest?
    I get so much lately it’s driving me crazy so any help is very
    much appreciated.

  8. Heya! I just wanted to ask if you ever have any problems with hackers?

    My last blog (wordpress) was hacked and I ended up losing many
    months of hard work due to no data backup. Do you have
    any methods to stop hackers?

  9. Amazing blog! Do you have any helpful hints for aspiring writers?
    I’m planning to start my own blog soon but I’m a little
    lost on everything. Would you advise starting with a free platform like WordPress or go for a paid option? There are so many choices out there
    that I’m completely confused .. Any suggestions? Thanks!

  10. Its like you read my mind! You seem to know so much approximately this,
    like you wrote the book in it or something. I feel that you just could do with a few
    percent to pressure the message home a little bit, however other than that, that is
    great blog. An excellent read. I will definitely be back.

  11. Hmm is anyone else having problems with the pictures on this blog loading?

    I’m trying to find out if its a problem on my end or if it’s the blog.
    Any suggestions would be greatly appreciated.

  12. Do you have a spam issue on this site; I also am a blogger, and I was wondering your situation; we have developed some nice practices and
    we are looking to trade methods with others, why not shoot
    me an e-mail if interested.

  13. Nice post. I was checking constantly this blog and I’m inspired!

    Extremely useful info particularly the final phase 🙂 I handle such information a lot.
    I was seeking this particular info for a long time.
    Thank you and good luck.

  14. Hi there! Do you know if they make any plugins to assist with SEO?
    I’m trying to get my blog to rank for some targeted keywords but I’m not seeing very good results.
    If you know of any please share. Thank you!

  15. Hey! This is my first visit to your blog! We are a team of
    volunteers and starting a new initiative in a
    community in the same niche. Your blog provided us beneficial information to work
    on. You have done a marvellous job!

  16. Great beat ! I wish to apprentice while you amend your web
    site, how could i subscribe for a weblog website?
    The account aided me a applicable deal. I have been a little bit acquainted of this your broadcast provided vibrant clear concept

  17. Hello! Do you know if they make any plugins to
    protect against hackers? I’m kinda paranoid about losing everything I’ve
    worked hard on. Any tips?

  18. Thanks for your marvelous posting! I really enjoyed reading it, you are a great author.
    I will always bookmark your blog and definitely will come back sometime soon. I want
    to encourage you continue your great job, have a
    nice afternoon!

  19. Nice blog! Is your theme custom made or did you download it from somewhere?

    A design like yours with a few simple adjustements would really make
    my blog jump out. Please let me know where you got your design. Bless
    you

  20. Its such as you read my mind! You seem to know a lot approximately this, such as you wrote the ebook in it or something.
    I think that you just can do with a few
    % to force the message house a bit, but other than that, this is
    great blog. A great read. I’ll certainly be back.

  21. The other day, while I was at work, my sister stole
    my iphone and tested to see if it can survive
    a 25 foot drop, just so she can be a youtube sensation. My apple ipad is now broken and she has 83 views.
    I know this is totally off topic but I had to share it with someone!

  22. It’s actually a nice and useful piece of information. I am happy that you simply shared this helpful info with us.

    Please stay us informed like this. Thank you for sharing.

  23. I was extremely pleased to discover this website. I need
    to to thank you for ones time for this wonderful read!!
    I definitely savored every little bit of it and I have you book marked to look at new information on your web site.

  24. Terrific article! This is the kind of information that
    are meant to be shared around the net. Shame on Google for no longer positioning this put up upper!
    Come on over and seek advice from my website .
    Thank you =)

  25. Hi there, I discovered your blog by way of Google even as looking for a comparable
    topic, your website got here up, it looks good.
    I’ve bookmarked it in my google bookmarks.
    Hi there, just became aware of your weblog through Google, and
    found that it is truly informative. I’m going to watch out
    for brussels. I’ll be grateful in the event you continue this
    in future. Many people will likely be benefited out of your writing.

    Cheers!

  26. I am not sure the place you are getting your information, but good topic.
    I must spend a while studying much more or understanding more.
    Thanks for great info I used to be looking for this info for my mission.

Leave a comment

Your email address will not be published. Required fields are marked *