Angiosperms And Gymnosperms Quiz: Test

Fertilization is the process in which the sperm and egg combine to form a zygote. This is the union of the genetic material from both parents, resulting in the formation of a new individual. Pollination refers to the transfer of pollen from the male reproductive organ to the female reproductive organ in plants. Meiosis and mitosis are cellular processes involved in the division and replication of cells, but they do not specifically refer to the union of sperm and egg. Therefore, fertilization is the correct answer in this context.

A perfect flower refers to a flower that contains both male and female reproductive organs, namely stamens and pistils. In this case, since both stamens and pistils are present, the flower can be classified as a perfect flower.

Pollination refers to the transfer of pollen from the anther (the male reproductive organ) to the stigma (the female reproductive organ) of a flower. This process is essential for fertilization to occur, as it allows the pollen grains to reach the ovary and fertilize the ovules. Migration, on the other hand, refers to the movement of organisms from one region or habitat to another. Therefore, the correct answer is Pollination.

Double fertilization is a unique process that occurs only in flowering plants. During double fertilization, two sperm cells are involved in the fertilization of the ovule. One sperm fertilizes the egg cell to form the embryo, while the other sperm combines with the polar nuclei to form the endosperm, which provides nourishment to the developing embryo. This process is not found in any other group of plants, making it a distinguishing characteristic of flowering plants.

Angiosperms, also known as flowering plants, are indeed covered seeds. They are characterized by the presence of flowers and fruits, which protect and contain the seeds. The seeds of angiosperms are enclosed within a protective structure called the ovary, which develops into a fruit after fertilization. This unique feature sets angiosperms apart from gymnosperms, which have naked seeds. Therefore, the statement "Angiosperms are covered seeds" is true.

After fertilization, the ovule undergoes a series of changes and develops into a seed. The ovule contains the female reproductive structures of the plant, including the egg cell. When fertilization occurs, the sperm cell from the pollen grain fuses with the egg cell, resulting in the formation of a zygote. This zygote then develops into an embryo, which is enclosed within the ovule. The ovule also undergoes changes in its outer layers, forming a protective seed coat. Therefore, it is correct to say that after fertilization, the ovule becomes the seed.

During double fertilization in plants, one sperm fertilizes the egg to form the embryo, while the other sperm fuses with the polar nuclei to form the endosperm. The endosperm is a tissue that provides nutrients to the developing embryo. It undergoes rapid mitosis, or cell division, to form a large nutritive source in the seed. Therefore, the statement is true.

An imperfect flower is the correct answer because it is the only option that aligns with the statement that each flower has either a stamen or a pistil, but not both. A perfect flower, on the other hand, has both male and female reproductive organs (stamen and pistil) in the same flower. Therefore, the statement contradicts the definition of a perfect flower. The option "None of the above" is also incorrect because it does not acknowledge the possibility of a flower being imperfect.

A compound pistil is the correct answer because it refers to a flower structure where multiple pistils are fused together. A pistil is the female reproductive part of a flower, consisting of an ovary, style, and stigma. In this case, the flower has several pistils that have merged into a single structure, forming a compound pistil.

Pollen grains are involved in the formation of microspores. Microspores are produced by the microsporangia of seed plants through the process of microsporogenesis. These microspores then develop into male gametophytes, which contain the sperm cells necessary for fertilization. Pollen grains are the male gametophytes in seed plants, and they are responsible for the transfer of sperm cells to the female reproductive structures. Therefore, the correct answer is Microspores.

A flower with a single pistil refers to a flower that has only one female reproductive organ. The pistil is the female part of the flower, consisting of the stigma, style, and ovary. In a simple pistil, these three parts are fused together as a single unit. This is in contrast to a compound pistil, where multiple pistils are present in the same flower. Carpel is another term used to describe the female reproductive organ in a flower, which includes the pistil. Therefore, the correct answer is simple pistil, as it accurately describes a flower with a single pistil.

The correct answer is Megagametophyte (female gametophyte). In plants, the female gametophyte is called the megagametophyte. It is responsible for producing the egg cells or ovules, which are necessary for sexual reproduction. The megagametophyte typically contains multiple nuclei, which are involved in the development of the female reproductive structures. The other options, microgametophyte (male gametophyte) and macrogametophyte, are incorrect as they refer to the male gametophyte and an incorrect term, respectively.

Navel oranges
Supermarket bananas
Some seedless grapes

The explanation for the given answer is that the germinated pollen grain with its tube nucleus and two sperm nuclei is referred to as the microgametophyte or male gametophyte. In plants, the male gametophyte is produced by the germination of a pollen grain and consists of the tube nucleus, which grows to form a pollen tube, and two sperm nuclei, which are involved in fertilization. The microgametophyte is responsible for delivering the sperm nuclei to the female gametophyte for fertilization to occur. Therefore, the correct answer is Microgametophyte (male gametophyte).

The correct answer is Superior ovary because in this case, the ovary is positioned above the receptacle, while the other flowering parts originate from below the ovary. This arrangement is characteristic of plants with superior ovaries, where the ovary is located above the attachment point of the other floral parts.

The dominant generation refers to the stage in the life cycle of a plant where it is more prominent and longer-lived compared to the other stage. In the case of plants, the sporophyte generation is the dominant generation. This is because the sporophyte is the stage where the plant produces spores, which can develop into new individuals. The sporophyte generation is usually larger and more complex than the gametophyte generation, which is the stage where the plant produces gametes for sexual reproduction. In bryophytes and pteridophytes, the sporophyte generation is the dominant one.

The correct answer is "Inferior ovary". This means that the ovary is situated below the point of attachment of the other flower parts. In this case, the ovary is embedded within the receptacle, and the other flower parts originate above it. This arrangement is characteristic of plants with an inferior ovary.

The correct answer is "Monocot" because Liliopsida is a class of flowering plants that includes monocots. Dicots, on the other hand, belong to the class Magnoliopsida. Therefore, the correct answer is "Monocot" as it is the only option that correctly identifies a class of plants.

The correct answer is Carpel. A carpel is a section within the pistil of a flower that bears ovules. It is the female reproductive organ of a flower and consists of three main parts: the stigma, style, and ovary. The ovules are contained within the ovary and are eventually fertilized to develop into seeds. Therefore, the carpel plays a crucial role in the reproduction of flowering plants.

The correct answer is "Dicot." Magnoliopsida is a class of flowering plants that includes dicots, which are characterized by having two cotyledons in their seeds. Monocots, on the other hand, have only one cotyledon. Therefore, the correct answer is dicot, as it is a specific category within the broader class of Magnoliopsida.

Willows

Pumpkin family

The generative nucleus The tube nucleus

Advanced flowers have a reduced number of flower parts, meaning they have a smaller number of petals, sepals, stamens, and carpels compared to more primitive flowers. The flower parts are arranged in whorls, with each whorl containing a specific number of parts. They have a compound pistil, which means that the pistil is made up of two or more fused carpels. In some groups, the ovary is positioned below the attachment point of other floral parts, making it inferior. Some advanced flowers exhibit bilateral symmetry, meaning they can be divided into two equal halves only along one plane. Additionally, some advanced flowers have unisexual flowers, meaning that they have separate male and female flowers on the same plant. These flowers do not have a simple pistil, which is a single carpel.

Primitive flowers are characterized by having many flower parts, which means they have a large number of sepals, petals, stamens, and pistils. These flower parts are arranged spirally, meaning they are not arranged in distinct whorls or layers. Primitive flowers also have radially symmetrical flowers, meaning they can be divided into equal halves in any plane passing through the center. They have a compound pistil, which means the pistil is made up of multiple fused carpels. Additionally, primitive flowers have a superior ovary, which means the ovary is positioned above the attachment of other floral parts.