Topics in Agricultural ScienceAsexual Propagation in Plants, Types and Examples Differences between Gymnosperms and Angiosperms Scheme of Work, Agricultural Science, SS1, First Term Scheme of Work, Agricultural Science, SS1, Second Term Scheme of Work, Agricultural Science, SS1, Third Term Len 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: Uses of Land Anatomical and Structural Differences between Gymnosperms and Angiosperms Plant Propagation: Sexual Propagation in Plants Pests of Agricultural importance and Crops Attacked Differences between a Plant and a Crop Problems of Agriculture in Nigeria
Academic Questions in Agricultural Science
A female chicken less than one year old is referred to as a _____.
Small plants that grow via vegetative propagation from the parent plants are called _____.
The female part of the flower comprising the stigma, style and ovary is the _____.
Which of the following food is best preserved through pasteurization?
The total number of parasites that are present in a host organism is termed _____.
All plants are crops.
TRUE or FALSE
One of the ways through which life is naturally formed is via a process termed fertilization.
Think of fertilization as a the fusion of sperm and egg or ova (with the exchange of genetic materials) leading to the formation of a zygote.
For fertilization to occur in plants, it's the pollen grain that comes into contact with the ova; and a zygote is formed, giving rise to a seed.
Note: Another method through which life may be formed is via a process termed regeneration. In some organisms, certain cells regenerate missing parts, creating an entire organism in the process. This is called totipotency.
Plant propagation is the branch of horticulture that involves the process of creating new plants.
Sexual propagation and Asexual propagation are the 2 methods of plant propagation.
In this article, we will discuss on sexual propagation (also called sexual reproduction) in plants.
The term "sexual" refers to any process involving the male gamete and the female gamete.
Think of gametes as sex cells; that is, sperm and ova/egg (or pollen grains and ova in the case of plants).
The flower is the reproductive organ in plants' sexual reproduction. In order to yield a successful sexual propagation or reproduction in plants, the floral parts of the flower are utilized.
The floral parts of a flower consists of the followings:
The stamen is male portion of a plant. It consists of the anther and filament.
The carpel (or pistil) is the female portion of the plant. It consists of the stigma, style and ovary.
The image below shows the floral parts of a flower:
A zygote is formed when the pollen grains from the anther of a flower is transferred to the stigma of a flower (of the same plant or another plant) by certain agents like wind, water or animal leading to the eventual fertilization of the egg or ova. This process is termed pollination.
The seed is the product of sexual reproduction and it's composed of three parts. These are:
A seed has it's own genotype. Half of this genotype comes from the pollen grain and the other half from the egg/ova. Consequently, the resulting plant from such seed will possess characteristics from the parent plant(s).
Note: Some seeds are not produced sexually. A typical example is the hawkweed (Hieracium specie). It produces seed without sexual union through a process called apomixis. Seeds produced in this way are called apomictic seeds.
Certain bisexual flowers are self sterile. This means that whenever pollen grains from a flower is deposited on the stigma of the same flower (bisexual flower), no fertilization will occur.
Think of a bisexual flower as one that contains the male reproductive organ (carpel) and the female reproductive organ (stamen or pistil).
In another type self sterile flowers, the male and female gamete mature at different times, making fertilization impossible.
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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.