{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 30 SG - Chapter 30 Seed Plants Share 4 Traits...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 30 Seed Plants Share 4 Traits- reduced gametophytes, heterospory, ovules and pollen a. Reduced Gametophytes- allows gametophyte development from spores within sporangia, protecting female egg from UV, obtaining nutrients from sporophyte (egg survival higher reproduction rate) b. Heterospory- megasporophyll megasporangia 1 fem-gam; microsporophyll microsporangia many male-gam c. Ovules Egg- seed plants unique in keeping megaspore within parent sporophyte; egg never leaves (like princess in castle) 1. Integuments - layered tissue that protect megasporangium; gymnosperms have ONE while angiosperms have TWO 2. Ovule - whole structure consisting of megasporangium, megaspore and their integument(s); for female gametophytes d. Pollen Sperm- need to leave parent plant either by wind or animal transport to get to egg (prince need to reach her) 1. Pollen Grains - developed from microspores, are protected by sporopollenin 2. Pollination- the transfer of pollen to seed plant with ovule; no flagellated sperm no water required; adapted from seedless Seed- development of ovule once sperm fertilizes egg; *consists of embryo, food supply, and protective coat from integuments* Can resist harsher environment and disperse offspring widely Multicellular, unlike spore, and can remain dormant until conditions moderate; can germinate with sporophyte embryo seedling Gymnosperm- naked seeds formed into cones (strobili) a. Cycadophyta- 2 nd largest group; has large cones, palm-like leaves; thrived during Mesozoic Era b.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern