True or false. 1.) The ovary becomes the seed when matures 2.) Pollination is the transfer of pollen grains from the stamen to the stigma 3.) Double fertilization in plants produces two zygotes. 4.) The anther contains the female sex cells of the plants. 5.) Epigeal germination occurs when the cotyledon remains below the ground.

True or false. 1.) The ovary becomes the seed when matures 2.) Pollination is the transfer of pollen grains from the stamen to the stigma 3.) Double fertilization in plants produces two zygotes. 4.) The anther contains the female sex cells of the plants. 5.) Epigeal germination occurs when the cotyledon remains below the ground.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter27: Reproduction And Development Of Flowering Plants

Section: Chapter Questions

Problem 4SA: In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that...

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Concept explainers

Angiosperm Reproduction

The process of sexual reproduction in flowering plants is known as angiosperm reproduction. In flowering plants, reproduction begins with pollination, or the transfer of male gametes (pollen) from the male reproductive organ (anther) to the female reproductive organ (pistil), and ends with fertilization of the female gametes (egg), which produces a zygote, which then grows to become a mature plant.

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Double 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.
Suppose 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.
4. A) Identify which type of light (Red or Far-Red) simulates seed germination. B) Identify which type of light (Red or Far-Red) inhibits seed germination. C) If a group of seeds was exposed to the following light sequence: red → far-red →red → far-red → red → darkness, would seed germination be inhibited or simulated? Please answer in order and label them.
8.a) Describe the function of pollen in gymnosperm and angiosperm sexual reproduction. b)What are the three most important nutrients for plant growth? c)Why do most commercial fertilizers contain only macronutrients? d)Name the five plant growth regulators that are found in most plants.
Plants and animals originated in water environments and, much later, plants invaded the land and later still, animals invaded the land. a) With respect to the four groups of plants (Bryophytes, seedless vascular plants, Gymnosperms, and Angiosperms), give the basic method of fertilization. That is, how do the sperm reach the eggs? b) What is the significance of the fertilization methods to the invasion of the land by the Gymnosperms and Angiosperms?
1. a)List two characteristics of plants that make them unique. b)Why do plants need to exchange gases with the environment? c)Distinguish between a fibrous root and a taproot. d)What is the main driving force for the movement of water in plants? e)State four benefits of asexual reproduction in plants.
1) Read the following paragraph carefully. There are several mistakes within the paragraph. The ancestors of seed plants are thought to have been heterosporous. In modern day gymnosperms, megasporangia produce the gametes that give rise to the male gametophyte. Gymnosperm and angiosperm megasporangia have one integument layer. The megasporangia is haploid and makes the megaspore. a) How many mistakes are in the above paragraph? b) Rewrite the paragraph to be correct. Underline any changes you make to correct the statements.
Angiosperms A) List 3 things about flowers and flower dissection. B) list the flower structures that are visible in a honeysuckle and a bloodroot c) describe the fruit and/or seed, and how the seeds are dispersed of dandelion, maple, burdock and corn from an oak tree.
A) How does a seed differ from a spore? Group of answer choices A seed must start growing right away, while a spore can lie dormant through adverse environmental conditions A seed has a protective coating, while a spore does not A spore has a protective coating, while a seed does not A spore contains an embryo, while a seed contains just a single cell A seed contains a food reserve, while a spore does not B) Angiosperms are the most successful plants on Earth. One reason for this is that Group of answer choices They rely solely on wind to disperse their seeds They rely solely on wind for pollination They lack vascular tissues Pollination of angiosperms is more targeted They are unique among plants in that they do not have a haplodiplontic life cycle
A tree produces only seedless oranges. A small branch cut from this tree produces roots after it is planted in soil. When mature, this new tree will most likely produce 7) A) a majority of oranges with seeds and only a few oranges without seeds B) oranges without seeds, only C) oranges with seeds, only D) oranges and other kinds of fruit
A B C D G E F H a) On the diagram, which labeled structure represents the mature male gametophyte? I b) Which labeled structure represents the female megasporangium, prior to the production of spores? c) On the diagram, which labeled structure represents the immature male gametophyte? F d) Which labeled structure represents the mature female gametophyte? J
A plant biologist discovers a new species of plant in the ashes of a recent forest fire along the sides of a steep mountain range. It is fall, and temperatures are dropping below freezing. The biologist cannot stay in the field to observe the plant. What can he infer about the plants reproductive strategy based on his recent observations? A) the plant will produce flowers because at this altitude there is sufficient sunlight B) the plant will produce comes because cones will mature into adult plants more rapidly C) the plant will produce cones because cones allow for seed dispersal through all seasons D) the plant will produce flowers because flowers can protect the seed from extreme conditions