Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 31.3, Problem 1TYK
Summary Introduction
Introduction:
Pollen grain represents the stage of male gametophyte. Pollen consists of two layers .the outer one is discontinuous and refers to exine, and the inner one is continuous and refers to intine.mostly pollen is released by anther in a 2-celled stage, but in some of plant 3- the celled stage is also reported.
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_______of the pollen grain divides to form two male gametes.
(a) Vegetative cell
(b) Generative cell
(c) Microspore mother cell
(d) None of these
This figure summarises the life cycle of a seed plant. The blue circles named A and B represent the sexually mature individual of each phase of the life cycle.
1) What is this life cycle called?
2) Plant B is in the diploid phase. What is another name for this plant?
3) If A is the haploid phase, in which phase would you find sepals? Write just the letter of the individual corresponding to the correct phase
4) If B is the haploid phase, in which phase would you find synergids? Write just the letter of the individual corresponding to the correct phase
5) If B is the diploid phase, in which phase would you find the nucellus? Write just the letter of the individual corresponding to the correct phase
6) If A is the diploid phase, in which phase would you find the sperm cells? Write just the letter of the individual corresponding to the correct phase
7) If A is the diploid phase, in which phase would you find selection on flower colour? Write just the letter of the individual corresponding…
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
Chapter 31 Solutions
Principles of Biology
Ch. 31.1 - Prob. 1BCCh. 31.1 - What advantages do flowering plants obtain by...Ch. 31.1 - Prob. 2CCCh. 31.1 - Prob. 3CCCh. 31.1 - Prob. 1TYKCh. 31.1 - What is a unique combination of reproductive...Ch. 31.2 - What inference can you draw from the observation...Ch. 31.2 - Prob. 1TYKCh. 31.3 - Prob. 1CCCh. 31.3 - Prob. 2CC
Ch. 31.3 - Prob. 1BCCh. 31.3 - Prob. 1TYKCh. 31.4 - Prob. 1CCCh. 31.4 - Prob. 1TYKCh. 31.5 - Prob. 1TYKCh. 31 - Where do the pollen grams of flowering plants...Ch. 31 - Prob. 2TYCh. 31 - Where would you find female gametophytes of a...Ch. 31 - Prob. 4TYCh. 31 - Prob. 5TYCh. 31 - Prob. 6TYCh. 31 - Prob. 7TYCh. 31 - Prob. 8TYCh. 31 - Prob. 9TYCh. 31 - Why are pollen grain walls composed of...Ch. 31 - Prob. 2CCQCh. 31 - Prob. 3CCQCh. 31 - Prob. 1CBQ
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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
- In plant life cycles, (a) the first products of meiosis are gametes (b) spores are part of the diploid sporophyte generation (c) the embryo gives rise to a zygote (d) the first stage in the diploid sporophyte generation is the zygote (e) the first stage in the haploid gametophyte generation is the prothallusarrow_forwardWhich of the following structures in a flower is not directly involved in reproduction? a. the style b. the stamen c. the sepal d. the antherarrow_forwardCallase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by: (a) pollens (b) tapetum (c) middle layers (d) endothecium.arrow_forward
- Which of the following statements regarding plants is false?a. Meiosis within anthers produces spores that develop intopollen.b. Meiosis within ovules produces spores that develop into anembryo sac.c. The male gametophyte is a pollen grain, and the femalegametophyte is an embryo sac.d. Meiosis directly produces sperm and egg cells in plantsarrow_forwardIn plant reproduction, fertilization occurs when the male and female sex cells form ______________. * Choose the right answer: a.) a clone b.) a sprout c.) a petal d.) a seedarrow_forwardAfter pollen lands on a stigma, it is far away from the ovule with the megagametophyte, which holds the egg (the megagamete). How are the two sperm cells transported from the stigma to the egg?arrow_forward
- How does double fertilization occur in flowering plants?a. The two sperm in a pollen tube fertilize the two egg cells present ineach female gametophyte.b. One of the two sperm in a pollen tube fertilizes the single egg in afemale gametophyte, and the other fuses with the two nuclei presentin the central cell.c. Two sperm, one contributed by each of two different pollen tubes,fertilize the two egg cells in a single female gametophyte.d. Two sperm contributed by separate pollen tubes enter a singlefemale gametophyte; one of the sperm fertilizes the egg cell, and theother fertilizes the central cell.e. None of the above is correct.arrow_forwardArrange the following flower and fruit development processes in order. (1st step to 5th step)The microspore mother cell produces haploid microspores. => stepThe flower produces pollen grains that will land on the stigma. => StepThe tube cell forms the pollen tube, anchoring on the synergid. => StepFirst sperm will fertilize the egg to form the zygote (becoming the embryo later on). => StepThe ovary wall enlarges forming the pericarp. => Steparrow_forward5. Using the illustrations above, arrange the following statements to explain the process of pollen formation in angiosperms. (Microsporogenesis) A. A diploid sporogenous cells differentiate as microsporocytes (pollen mother cells or meiocytes) which divide by meiosis to form four haploid nucleus. B. Distinct single-celled haploid microspores form after cytokinesis.arrow_forward
- The drooping, bell-like flower Aquilegia canadensis is adapted for cross-pollination. However, if the plant has not been pollinated previously, self-pollination can occur. However, if cross pollination occurs after self-pollination takes place, the pollen from cross pollination reaches the style before the pollen from self-pollination. Using course concepts and vocabulary 1) Provide a reasoning for this phenomenon. 2) Would this adaptation for reproduction be beneficial for the plant?arrow_forwardIf there are 4 cells in anthers, what will be the number of pollen grains?arrow_forwardCorn develops from a seedling with a single cotyledon, displays parallel veins on its leaves, and produces monosulcate (single groove) pollen. Given this information, which term best characterizes corn?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