Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 26, Problem 13RQ
In the course of double fertilization, one sperm cell fuses with the egg and the second one fuses with ___________ .
- the synergids
- the polar nuclei of the center cell
- the egg as well
- the antipodal cells
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Question 10
9.
are found at the chalazal end of the embryo sac.
Polar nuclei
O Synergids
Eggs
Ovules
O Antipodals
After the sperm cells enter a synergid, one fertilizes the egg in a two-step process. First there is fusion of the sperm cell’s protoplasm with that of the egg, a step called ______________________________. Then the sperm cell nucleus fuses with the egg cell nucleus, the second step, called _____________________________.
Eggs
Sperm
Sexual
reproduction
Zygote
The process illustrated in this diagram is called
sporulation
gastrulation
mitosis
fertilization
meiosis
Chapter 26 Solutions
Biology 2e
Ch. 26 - Figure 26.8 At what stage dees the diploid zygote...Ch. 26 - Figure 26.15 If a flower lacked a megasporangium,...Ch. 26 - Seed plants are. all homosporous mostly...Ch. 26 - Besides the seed, what ether major structure...Ch. 26 - In which of the following geological periods would...Ch. 26 - Which of the following structures widens the...Ch. 26 - Which of the following traits characterizes gym...Ch. 26 - Megasporocytes will eventually produce which of...Ch. 26 - What is the ploidy of the following structures...Ch. 26 - In the northern forests of Siberia, a tall tree is...
Ch. 26 - Which of the following structures in a flower is...Ch. 26 - Pollen grains develop in which structure? the...Ch. 26 - In the course of double fertilization, one sperm...Ch. 26 - Corn develops from a seedling with a single...Ch. 26 - Which of the following plant structures is not a...Ch. 26 - White and sweet-smelling flowers with abundant...Ch. 26 - Abundant and powdery pollen produced by small,...Ch. 26 - Plants are a source of food fuel medicine all of...Ch. 26 - The Triassic Period was marked by the increase in...Ch. 26 - What role did the adaptations of seed and pollen...Ch. 26 - The Mediterranean landscape along the sea shore is...Ch. 26 - What are the four modern-day phyla of gymnosperms?Ch. 26 - Some cycads are considered endangered species and...Ch. 26 - What are the two structures that allow angiosperms...Ch. 26 - Biosynthesis of nectar and nutrient-rich pollen is...Ch. 26 - What is biodiversity and why is it important to an...
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- Fertilization _____. a. unites the nuclei of a sperm and egg cell b. forms a zygote that has chromosomes of both parents c. usually occurs in an oviduct d. all of the above e. a and b but not carrow_forwardFigure 32.8 An embryo sac is missing the synergids. What specific impact would you expect this to have on fertilization? The pollen tube will be unable to form. The pollen tube will form but will not be guided toward the egg. Fertilization will not occur because the synergid is the egg. Fertilization will occur but the embryo will not be able to grow.arrow_forwardFigure 23.25 Which of the following statements about Paramecium sexual reproduction is false? The macronuclei are derived from micronuclei. Both mitosis and meiosis occur during sexual reproduction. The conjugate pair swaps macronuclei. Each parent produces four daughter cellsarrow_forward
- Order the events leading to the sperm's nucleus fusing with the egg's nucleus. Question 1 options: sperm's nucleus is released into the egg's cytoplasm sperm burrows through the orona radiata sperm's nucleus and egg's nucleus fuse sperm's cell memrbane fuses with egg's cell membrane sperm's acrosome enzymes burrows through the zona pellucida the zona pellucida changes so that any new sperm's acrosome cannot burrow through the zona pellucidaarrow_forwardWhere does fertilization (the union of a sperm and egg) take place? vagina uterus ovary oviduct zygote epididymisarrow_forwardWhich of the following does NOT aid the sperm in fertilization? * Increased mitochondria Cytoplasmic bridge Acrosomes Flagellum development Hyaluronidase & proteasearrow_forward
- Fertilized egg What structure tells you what stage this is? Blastocoel O Visible nucleus O Archenteron Blastopore O Fertilization envelopearrow_forwardSelect ALL of the following that occur during spermiogenesis: Microtubules form a flagellum The nucleus condenses O Proteolytic (digestive) enzymes are bundled in an acrosomal cap Excess cytoplasm is shedarrow_forwardIn embryos with spiral cleavage the 4d cell gives rise to which germ layer_______________________________. Group of answer choices endoderm gastroderm mesoderm ectoderm epidermarrow_forward
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