Biology 2e
2nd Edition
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter24: Fungi
Section: Chapter Questions
Problem 1VCQ: Figure 24.14 Which of the following statements is true? A dikaryotic ascus that forms in the...
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![Pollen grains
disperse via wind
MITOSIS
MEIOSIS
POLLINATION
Haploid (n)
|Diploid (2n)
Microspore (n)
forms pollen grain
Pollen grain
(male gametophyte)
Cones with
microsporangia
Four meiotic
products; one is
large and forms
the megaspore (n)
Megasporangium
Mother
cell (2n)
Three meiotic
| products die
MEIOSIS
Pollen grain
Ovules (contain
megasporangia)
Ovulate cone
Female
gametophyte (n) -
Egg (n) -
| Megaspore divides to
form female gametophyte (n),
which forms eggs by mitosis.
(Only one egg is fertilized
| and develops.)
Embryo
(2n)
Pollen tube
FERTILIZATION
MITOSIS
Pollen tube
Mature
Developing
sporophyte
delivers sperm
to egg
sporophyte (2n)
Seeds (disperse
via wind or animals)
Heterospory in Gymnosperms: Microspores Produce Pollen Grains; Megaspores Produce Female Gametophytes.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1e69a358-0e29-48c6-949e-96b655159f87%2F060d2fa8-2961-44ce-a157-90aa5e03dc43%2Fj8ajggb_processed.png&w=3840&q=75)
Transcribed Image Text:Pollen grains
disperse via wind
MITOSIS
MEIOSIS
POLLINATION
Haploid (n)
|Diploid (2n)
Microspore (n)
forms pollen grain
Pollen grain
(male gametophyte)
Cones with
microsporangia
Four meiotic
products; one is
large and forms
the megaspore (n)
Megasporangium
Mother
cell (2n)
Three meiotic
| products die
MEIOSIS
Pollen grain
Ovules (contain
megasporangia)
Ovulate cone
Female
gametophyte (n) -
Egg (n) -
| Megaspore divides to
form female gametophyte (n),
which forms eggs by mitosis.
(Only one egg is fertilized
| and develops.)
Embryo
(2n)
Pollen tube
FERTILIZATION
MITOSIS
Pollen tube
Mature
Developing
sporophyte
delivers sperm
to egg
sporophyte (2n)
Seeds (disperse
via wind or animals)
Heterospory in Gymnosperms: Microspores Produce Pollen Grains; Megaspores Produce Female Gametophytes.
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