Campbell Biology, Bio 101
18th Edition
ISBN: 9781323741665
Author: Reece
Publisher: Pearson Education
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Chapter 38, Problem 5TYU
Summary Introduction
Introduction: In fertilization fusion of gametes occurs after the two sperm reach the female gametophyte. One sperm fertilizes the egg and form zygote. The second sperm combines with the two polar nuclei and form a triploid (3n) nucleus in the center of central cell of the female gametophyte. This cell will form endosperm. The union of two sperm cells with different nuclei of the female gametophyte is called double fertilization.
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Students have asked these similar questions
A. What is double fertilization?
B. What are the products of double fertilization?
C. Explain the following quote “As an individual, the endosperm is unique as it has three ancestors and never leaves any descendants.” What are the three ancestors referred to in this quote? And why endosperm does not leave any descendants?
Double fertilization results in __________________________.
a.
a diploid zygote and triploid endosperm in each seed
b.
a spare sperm nucleus
c.
two diploid zygotes in every seed
d.
none of these answers is correct
e.
three diploid zygotes; one of the three will form will develop into a sporophyte embryo in a seed, one will die and the third will migrate out of the megasporangium and form a separate male plant
How many ovaries are there in a flower with a compound pistil containing 10 carpels?
Chapter 38 Solutions
Campbell Biology, Bio 101
Ch. 38.1 - Distinguish between pollination and fertilization.Ch. 38.1 - Prob. 2CCCh. 38.1 - MAKE CONNECTIONS Does the life cycle of humans...Ch. 38.2 - What are three ways that flowering plants avoid...Ch. 38.2 - Prob. 2CCCh. 38.2 - Prob. 3CCCh. 38.3 - Compare traditional plant-breeding methods with...Ch. 38.3 - Why does Bt maize have less fumonisin than non-GM...Ch. 38.3 - WHAT IF? In a few species, chloroplast genes are...Ch. 38 - What changes occur to the four types of floral...
Ch. 38 - Prob. 38.2CRCh. 38 - Prob. 38.3CRCh. 38 - A fruit is (A) a mature ovary. (B) a mature ovule....Ch. 38 - Prob. 2TYUCh. 38 - Double fertilization means that (A) flowers must...Ch. 38 - Prob. 4TYUCh. 38 - Prob. 5TYUCh. 38 - A small flower with green petals is most likely...Ch. 38 - The black dots that cover strawberries are...Ch. 38 - DRAW IT Draw and label the parts of a flower.Ch. 38 - Prob. 9TYUCh. 38 - Prob. 10TYUCh. 38 - SCIENCE, TECHNOLOGY, AND SOCIETY Humans have...Ch. 38 - WRITE ABOUT A THEME: ORGANIZATION In a short essay...Ch. 38 - SYNTHESIZE YOUR KNOWLEDGE This colorized SEM shows...
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- Why is fertilization in flowering plants called double fertilization? two cells in the ovule are fertilized, the egg and the endosperm mother cell it takes the efforts of two flowers (male and female) to produce seeds two ovules must be fertilized to form a single seed one pollen grain fertilizes two ovules it takes two pollen grains to fertilize a single ovulearrow_forwardBerry: Tomato or Grape Examine fresh tomato fruits or other berry, noting the stalk or pedicel and the green sepals at the basal end. Where do you find the remains the style? Does the berry develop from a superior or an inferior ovary? Where were the petals and stamens attached? Is any other floral part united with the ovary in the formation of this fruit? Is the tomato an accessory fruit? Why or why not? Examine a cross-section of a tomato. How many locules (chambers) are visible? How many ovaries formed the fruit?arrow_forwardDouble fertilization is a) fertilization of an egg by two sperm. b) fertilization of two eggs by the same sperm. C) fertilization of two eggs in the same flower. d) fertilization of an egg by one sperm and an endosperm-forming cell by another sperm. e) fertilization of an egg and an endosperm-forming cell by the same sperm.arrow_forward
- What are the products of double fertilization?a. Two diploid zygotesb. A diploid zygote and a triploid endospermc. A haploid sperm and a diploid zygoted. A triploid zygotearrow_forwardMonoecious plants such as corn have either staminate or carpelate flowers. Knowing what you do about the molecular mechanisms of floral development, which of the following might explain the development of single-sex flowers? a. Expression of B-type genes in the presumptive carpel whorl will generate staminate flowers. b. Loss of A-type genes in the presumptive petal whorl will allow C-type and B-type genes to produce stamens instead of petals in that whorl. c. Restricting B-type gene expression to the presumptive petal whorl will generate carpelate flowers. d. All of the choices are correct.arrow_forwardWhat kinds of seeds are surrounded by an ovary wall?arrow_forward
- Answer the following question: What is meant by “double fertilization”? What features of seeds and fruits have enabled angiosperms to become so widespread?arrow_forwardin a mung bean, there is an attachment of the funiculus to the ovule. what do you think is the position of the ovule from which this seed is derived?arrow_forwardDefine the following terms:(a) aestivation (b) placentation (c) actinomorphic (d) zygomorphic (e) superior ovary (f) perigynous flower(g) epipetalous stamenarrow_forward
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