Question 1

The female gametophyte of an angiosperm consists of _________________.

Accepted Answer

The female gametophyte of an angiosperm consists of a large sac with 8 nuclei in 7 cells, known as the embryo sac.

Question 2

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the formation of a tube nucleus and the formation of sperms.

Accepted Answer

The formation of a tube nucleus occurs in the male gametophyte, which grows and elongates towards the ovule. The formation of sperms occurs after the tube nucleus reaches the ovule and fertilization takes place. Therefore, the first event (formation of tube nucleus) precedes the second event (formation of sperms).

Question 3

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the formation of endosperm tissue and the development of an embryo.

Accepted Answer

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Question 4

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the formation of antipodals and the formation of synergids.

Accepted Answer

Both antipodals and synergids are formed during the development of the female gametophyte (embryo sac) in the ovule, so they occur more or less simultaneously.

Question 5

The structure that matures into the seed is called a (an)

Accepted Answer

The ovule is the structure that matures into the seed. The megasporangium refers to the structure that contains the megaspore, which develops into the female gametophyte. The pollen grain is the male gametophyte and does not mature into the seed. The ovary contains the ovules and develops into the fruit. The ovuliferous scale is a structure found in certain plants and is not directly related to seed development.

Question 6

With over 250,000 species known, the phylum ___________ is the largest phylum in the plant kingdom.

Accepted Answer

Magnoliophyta, also known as angiosperms, is the largest phylum in the plant kingdom with over 250,000 known species. Gnetophyta, Ginkgophyta, Coniferophyta, and Psilotophyta are all smaller phyla with significantly fewer species.

Question 7

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the formation of polar nuclei and the formation of megaspores.

Accepted Answer

The formation of megaspores occurs first during the process of megasporogenesis, which is part of the development of the female gametophyte. The formation of polar nuclei occurs later during the development of the embryo sac, which is part of the female gametophyte development.

Question 8

Which of the following tissues or structures in flowering plants is a part of the gametophyte generation and therefore haploid?

Accepted Answer

Synergids are part of the female gametophyte (embryo sac) in flowering plants and are haploid, as they develop from the haploid megaspore through mitosis.

Question 9

Fertilization in angiosperms is characterized as _______________.

Accepted Answer

Fertilization in angiosperms involves the fusion of two sperm cells with two different female gametes (the egg and the central cell containing two polar nuclei), which is referred to as double fertilization. This process is unique to angiosperms and leads to the formation of a diploid zygote and a triploid endosperm.

Question 10

Which of the following is part of a compound ovary within which seeds develop from ovules?

Accepted Answer

The compound ovary is part of the carpel, which contains the ovules that develop into seeds. The style is a long, slender part of the carpel that connects the stigma to the ovary. The integument is the outer layer of the ovule, and the peduncle is the stem that attaches the flower to the main plant. Therefore, the only choice that is part of a compound ovary within which seeds develop from ovules is A) carpel.

Question 11

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the fusion of sperm and polar nuclei and the fusion of egg and sperm.

Accepted Answer

The answer of In this question, assume that the life...

Question 12

The name 'angiosperm' used for the flowering plants refers to ______________.

Accepted Answer

The term 'angiosperm' comes from the Greek words 'angeion', which means 'vessel', and 'sperma', which means 'seed'. This refers to the fact that angiosperms produce seeds enclosed in a protective structure called the ovary, which later develops into a fruit.

Question 13

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the division of a microspore nucleus and the formation of sculptured wall.

Accepted Answer

The division of a microspore nucleus (pollen grain) occurs during the process of microsporogenesis in the anthers of the flower. At the same time, the tapetum (a layer of cells surrounding the microspores) produces the sculptured wall, which surrounds the developing pollen grain. Therefore, both events occur more or less simultaneously.

Question 14

Angiosperms are characterized by the following: _____________________________.

Accepted Answer

All of the choices listed correctly describe angiosperms. They are the largest and most diverse phylum of the plant kingdom and they produce seeds inside the ovary, which develops into the fruit. Additionally, angiosperms have the smallest gametophytes in the plant kingdom.

Question 15

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the formation of microspore mother cells and the formation of microspores.

Accepted Answer

The formation of microspore mother cells (which undergo meiosis to form microspores) occurs before the formation of microspores in the life cycle of a flowering plant.

Question 16

The mature male gametophyte of an angiosperm consists of ___________________.

Accepted Answer

The mature male gametophyte of an angiosperm is the pollen grain, which consists of a vegetative nucleus and two sperm nuclei.

Question 17

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are formation of a pollen tube and pollination.

Accepted Answer

Pollination occurs before the formation of a pollen tube, as pollination is the transfer of pollen to the stigma, which then leads to the growth of a pollen tube for fertilization.

Question 18

Angiosperms differ from conifers in all of the following EXCEPT

Accepted Answer

The statement "All angiosperms are better adapted for living in areas with long winters than are the conifers" is incorrect. It is not true that all angiosperms are better adapted for living in areas with long winters than conifers, as there are many conifer species that are well-adapted to such environments. The other statements are all true and therefore do differentiate angiosperms from conifers.

Question 19

Which of the following tissues, cells, or structures in flowering plants is a part of the sporophyte generation and therefore diploid?

Accepted Answer

The sporophyte generation in flowering plants is diploid, meaning it has two sets of chromosomes. The integument, which eventually contributes to the formation of the seed coat, is a part of the ovule and thus part of the sporophyte generation. Therefore, cells of an integument are diploid.

Question 20

In this question, assume that the life cycle of a flowering plant begins with the germination of a seed and ends with the development of a fruit.Two events that occur in the life cycle are the germination of a pollen grain and the formation of a generative nucleus.

Accepted Answer

The formation of a generative nucleus occurs during the development of pollen in the anther before the pollen grain is released and germinates on the stigma.

Quiz 23: Seed Plants: Angiosperms