Topics in Agricultural ScienceLen Academy Agric Science exam questions, JSS1, First Term Len Academy Agric Science exam questions, JSS1, First Term, part 2 Agriculture Terms - Definitions and Meanings of Agricutural Terms (P - Q) Agricultural Terms: Definition and Meanings of Agricultural Terms (P and Q), part 2 Len Academy questions for Agric Science JSS1, 2nd Term Len Academy questions for Agric Science JSS1, 2nd Term, Part 2 Roles of Government in Agriculture Agricultural pest, Crops attacked, their economic importance and control Agriculture Terms - Definitions and Meanings of Agricutural Terms (I - O) Agricultural Land, Types, Purposes and Uses of Agricutural Land Characteristics and Differences between Gymnosperms and Angiosperms Plant Propagation, Methods of plant propagation Pests of Agricultural importance - Crop Pests, Examples of Pests and Crops attacked by Pests Differences between a Plant and a Crop Problems of Agriculture in Nigeria Agricultural tools and their uses - Agricultural machines and their functions Soil Erosion, Types, Causes and Solutions to Soil Erosion Fish Business: How to start a home based fish farming Agriculture Terms - Definitions and Meanings of Agricutural Terms (Letter "A")
Academic Questions in Agricultural Science
All plants are crops.
TRUE or FALSE
Gymnosperms and Angiosperms are seed bearing plants under the division of spermatophyte.
The spermatophytes are also known as phanerogams or seed plants simply because they consist of all plants that produce seeds.
Gymnosperms do NOT possess flowers.
The flowerless gymnosperms had first evolved before the angiosperms although the angiosperms appear to be more abundant in number and diversity after their evolution.
Gymnosperms and Angiosperms are siphonogamous plants. This means that they both produce pollen grains.
In this article, we will look into the differences between both groups of plants.
Below are some reproductive differences between Gymnosperms and Angiosperms:
Gymnosperms: Their reproductive structures are called cones.
Angiosperms: Flowers are the reproductive structures in angiosperms.
Gymnosperms: Cones are unisexual.
Angiosperms: Flowers are usually bisexual but a few can be unisexual.
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).
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.
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.
Gymnosperms: Cones are present.Angiosperms: Flowers are present.
Gymnosperms: Sepals and petals are not present in cones.
Angiosperms: Sepals and petals are parts of the floral parts of the flower.
Sepals are usually green in colour and are seen at the base of the flower. Their main function is to protect the flower.
Petals are the brightly coloured parts of a flower. They function to attract insect pollinators.
Gymnosperms: No Stigma and Style are present.
Angiosperms: Stigma and Style are present.
The stigma is a sticky component of a flower that receives the pollen grains.
The style is a tiny elongated stalk that connects the stigma to the ovary.
Gymnosperms: Fruits are not seen or formed. Only seeds are present.
Angiosperms: Fruits containing seeds are formed.
Gymnosperms: Companion cells are absent.
Angiosperms: Companion cells are present and are usually found within the phloem.
Gymnosperms: The sporophyll form the cones.
Angiosperms: The sporophyll form the flowers.
The sporophyll is a leaf that forms sporangia.
Gymnosperms: Anther and filament are absent.
Angiosperms: Anther and filament are present; and they make up the male part of the flower (called stamen).
Gymnosperms: The ovules are not present in the ovary. This is why the seed have no fruit.
Angiosperms: The ovules are present in the ovary. The ovary becomes the fruit while the ovules become the seed.
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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.
Amazing facts in Agricultural Science
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
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.
Some example of carnivorous plants include sundew and Venus flytrap.