A YourA YourClassS Launc9 LauncS LauncA ForenE Fo XForenO GradeM (beForenmonrent/d/1JRG2bCkck5BmrGpQDI5IbLXeULosgV-36SOBBKS F8M/editRequestPARTS OF A GYMNOSPERM#23OvuleSingle scale (sporophyll)MegasporangiumMegарoreocytе|#24IntegumentMicropyie#25Mature sporophyteMicrosporangiumSporophyll

The gymnosperms, also known as Acrogymnospermae, are a group of seed-producing plants that includes…

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PARTS OF A GYMNOSPERM #23 Ovule Single scale (sporophyll) Megasporangium せ24 Megaporeocyte #25 Integument Micropyle

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter29: Life Cycles Of Flowering Plants

Section: Chapter Questions

Problem 3SQ: In flowers, a _______ contains one or more ovaries. a. Pollen sac b. Carpel c. receptacle d. sepal

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Embryology

Question

A Your
A Your
Class
S Launc
9 Launc
S Launc
A Foren
E Fo X
Foren
O Grade
M (be
Foren
monr
ent/d/1JRG2bCkck5BmrGpQDI5IbLXeULosgV-36SOBBKS F8M/edit
Request
PARTS OF A GYMNOSPERM
#23
Ovule
Single scale (sporophyll)
Megasporangium
Megарoreocytе
|#24
Integument
Micropyie
#25
Mature sporophyte
Microsporangium
Sporophyll

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Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results. FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart Why is sporophyte formation a good way to determine if fertilization occurred?
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37 Wollemia nobilis, family Araucariaceae, phylum Coniferophyta, was discoveredrecently in a National Park in New South Wales, Australia. This stand of trees isremote and difficult to access. These trees can grow to 40 meters tall. Sadly, thisstand of trees has been infected with Phytophthora cinnamomi. An extensivebreeding program was undertaken and now this beautiful and ancient tree is readilyavailable for purchase. The common name for this tree is the Wollemi Pine.Answer the following questions in sentence format, that are related to the abovecase study. a. What is the dominant generatiopn of life of this plant?