Agricultural Science

Differences between Gymnosperms and Angiosperms

len Alfred Ajibola - Mon, 27th January, 2020 @ 12:25: PM

Topics in Agricultural Science

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Academic Questions in Agricultural Science

Please check out our Test Your Knowledge page to see all Questions and Answers

Cordage is made from _____ crop.

  • A. Food

  • B. Fibre

  • C. Ornamental

  • D. Oil

  • E. Cash

  • F. Vegetables and Spice

_____ is defined as the solid and arable part of the earth where agricultural activities are be carried out.

  • A. Soil

  • B. Farmland

  • C. Agricultural land

  • D. Biosphere

  • E. Open land

  • F. Planting and grazing land

Gymnosperms and angiosperms are seed bearing plants under the division spermatophyta?

  • A. True

  • B. False

Which of the following is false concerning gymnosperms?

  • A. Cones are present

  • B. Sepals are present

  • C. Petals are absent

  • D. Only seeds are produced

  • E. Sporophyll form the cones

  • F. In seed formation, the ovules aren't present in the ovary

Which of the following statement is incorrect concerning seeds?

  • A. The ovary develops into the seed after fertilization

  • B. The embryo in the seed develops into a young plant

  • C. The seed's endosperm serve as a source of food reserve for the developing embryo

  • D. A seed has its own genotype

  • E. Seeds are products of sexual reproduction

  • F. Apomictic seeds aren't produced sexually and the hawkseed is an example

The _____ is the reproductive organ in plant's sexual reproduction.

  • A. Pollen grain

  • B. Ova

  • C. Sperm

  • D. Flower

  • E. Fruit

  • F. Seed

In flowering plants, fertilization occurs when the _____ comes into contact with the ova (as genetic materials are eventually exchanged).

  • A. Sperm

  • B. Endosperm

  • C. Exosperm

  • D. Stigma

  • E. Ovule

  • F. Pollen grain

The fusion of sperm and ova in animals leads to the formation of _____.

  • A. Foetus

  • B. Embryo

  • C. Ovary

  • D. Neonate

  • E. Zygote

  • F. Egg



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Gymnosperms vs Angiosperms:

Gymnosperms and Angiosperms are plants that produce seeds. Seed bearing plants are categorized as spermatophytes.

Gymnosperms are believed to have existed before the angiosperms. Presently, the angiosperms are more diversified and numerous in comparison to the gymnosperms.

Please read on Plants versus Crops here.

Note: Gymnosperms and Angiosperms are siphonogamous plants. This means that they both produce pollen grains.

Please read on Agricultural Terms and Meanings here.

In this article, we will look at the reproductive differences between gymnosperms and angiosperms.

Please read on the Anatomical and Structural Differences between Gymnosperms and Angiosperms here.


Reproductive Differences between Gymnosperms and Angiosperms

Gymnosperms: Their reproductive structures are called cones.

Angiosperms: Flowers are the reproductive structures in angiosperms.

Please read on Sexual Propagation | Reproduction in Plants here.

Gymnosperms: Cones are unisexual.

Angiosperms: Flowers are usually bisexual but a few can be unisexual.

Please read on Asexual Propagation | Reproduction in Plants here.

Gymnosperms: The cones produces microspores and megaspores.

Angiosperms: The anther of the flower produces the microspore while the megaspores are produced by the ovules in the ovary.

  • Microspore are plant spores that becomes the male gametophyte (pollen grains).
  • Megaspores are plant spores that becomes the female gametophyte and ultimately the egg cell.

Gymnosperms: Pollination is generally by wind.

Angiosperms: Pollination requires different agents including, wind, water, insects and other animals.

  • Pollination refers to the process involving he transfer of pollen grains from the sexual parts of a plant.

  • The goal of pollination is to bring about fertilization. (That is, union of pollen grain and ova/egg cell).

You can attempt LEN ACADEMY Agric Examination Questions for JSS1 2nd Term here.

Gymnosperms: The pollen grains will germinate on the micropyle of the ovules. (Direct Pollination).

Angiosperms: The pollen grain germinates into the pollen tube on the stigma and the male gamete moves through this pollen tube. (Indirect Pollination).

Gymnosperms: The fertilization process is not as complex as that of the angiosperms.

Angiosperms: The fertilization process is doubled. This means that two male gametes fuses with the embryo sac or female gametophyte.

Gymnosperms: The endosperm is haploid.

Angiosperms: The endosperm is triploid.

  • The endosperm is a tissue with a high amount of nutrient found in the seeds of plants; and it nourishes the embryo inside the seed.
  • Note: It is the embryo that germinates when a seed is planted.

You can read on Pest of Agricultural Importance and Crops Attacked here.

Gymnosperms: The ovule develop into naked seeds.

Angiosperms: The ovule develops into seeds enclosed in the fruit.

Gymnosperms: No fruits are present.

Angiosperms: The ovary becomes the fruit.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 10 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.

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Amazing facts in Agricultural Science

Peanuts are legumes and not nuts

Although plants neither see nor hear, they can recognize their siblings and even give them preferential treatments

Squirrels do plant more trees (through their actions) than an average human in their lifetime. They often hide their acorns and nuts underground and forget about them

Cows have got the ability to walk up stairs, but not down stairs

A group of cows is called a team, drove or herd.

People just prefer to call them herd

NOTABLE POINTS IN Agricultural Science

Below are some common types of erosion:

  • Water Erosion: It is caused by rainfall and flooding on the topsoil. As a result of water erosion, some layers of the topsoil are lost.

  • Sheet Erosion: When an entire surface of land becomes eroded at a uniform (equal) level, such is referred to as sheet erosion. It is shown below:
    Sheet Erosion - Len Academy

  • Wind Erosion: It results from the actions of wind on a bare land. Wind erosion is often seen in deserts. Overgrazing and lack of vegetation cover will also enhance wind erosion on topsoil.

Please read more on types of soil erosion here.

Soil erosion is defined as a process through which the topsoil is removed or moved from one point to another by agents like wind, water, man and animals.

Soil erosion occurs naturally (wind and water) and may also be facilitated by living organisms.

Soil erosion is more likely to occur on a sloppy land and land with no vegetation cover. When this occurs, the nutrient rich layer of the topsoil is washed away; and this ultimately results in fewer plants growing on such eroded soil.

Please read more on soil erosion here

There are about 630 different kinds of carnivorous plants.

Carnivorous plants are plants that derive some or most of their nutrients by consuming small animals, especially insects.

Carnivorous plants are also referred to as insectivorous plants.

Examples of carnivorous plants include sundew and Venus flytrap.

Please read more on carnivorous plants here