WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
5th Edition
ISBN: 9781319272531
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 14, Problem 8SA
Summary Introduction
To analyze:
Why double fertilization is more efficient than the type of fertilization that occur in gymnosperms.
Introduction:
Gymnosperms are group of plants which do not have an outer covering or shell around their seeds. The name Gymnosperms means ‘naked seed’. They do not produce flowers and fruits.
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Which statement below is correct regarding the formation of the endosperm in angiosperms?
O the endosperm is formed from the female gametophyte and is haploid
O a single sperm nucleus fertilizes the egg nucleus to become the diploid zygote
O a sperm nucleus forms both the zygote and the endosperm through double fertilization
O a second sperm nucleus fuses with the two polar nuclei of the egg sac
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WHAT IS LIFE? GDE.TO BIOLOGY W/PHYSIO.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the role of double fertilization in angiosperm reproduction?arrow_forwardIn a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? ovary → style → stigma stigma → style → ovary ovary→ stigma→ style stigma→ ovary → stylearrow_forwardAnswer the following question: What is meant by “double fertilization”? What features of seeds and fruits have enabled angiosperms to become so widespread?arrow_forward
- What are the advantages and disadvantages of self and cross pollination? How are the structures of the pistil and stamen adapted for successful fertilization?arrow_forwardWhat is the difference between sperm and pollen (in both gymnosperms and angiosperms)?arrow_forwardAngiosperms rely on a number of control pathways that govern when to produce reproductive structures. Briefly describe any one of these pathways, including the processes, structures and/or molecules involved.arrow_forward
- Most of the approximately 900 species of gymnosperms are conebearing plants. On the surfaces of their cone scales are ovules, which later become seeds. These ovules are said to be naked because they are not completely enclosed by diploid tissue (as the ovules of angiosperms are). This characteristic gives the gymnosperms their name; gymnos is a Greek word meaning naked, and sperma means seed. Botanists now divide the gymnosperms into four groups: conifers, cycads, ginkgos, and gnetophytes.arrow_forwardWhy 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_forwardThe best answer describing angiosperm fertilization is: O a single sperm fertilizes an egg a single sperm fertilizes the antipodal cells O a single sperm fuses with the two polar nuclei one sperm fertilizes the egg, one fuses with the two polar nuclei to create 3N tissue one sperm fertilizes the egg, one fuses with the antipodal cells to create 3N tissuearrow_forward
- How do fertilization and zygote formation occur in these plants? Do these processes depend on water?arrow_forwardSuppose that 100 pollen grains land on a stigma, and 50 mature seeds are formed in the fruit. What does this indicate about the pollination process and success? A) 100% success: 100 pollen grains grew to 50 ovules, two to each, and double fertilization occurred. B) 100% success: Only 50% of the pollen grains germinated, but each produced 2 sperms to complete double fertilization in 50 seeds. C) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 50 polar nuclei. D) 50% success: 50 sperm fertilized 50 eggs, and 50 sperm fused with 100 polar nuclei. correct answer and explanation why please.arrow_forwardWhich of the following steps in the reproduction of angiosperms do animals assist with?arrow_forward
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Plant Reproduction in Angiosperms; Author: Amoeba Sisters;https://www.youtube.com/watch?v=HLYPm2idSTE;License: Standard YouTube License, CC-BY