Topics in Agricultural ScienceImportance of forest: Forest reserves in Nigeria Wildlife reserves in Nigeria and its importance Prevention and Control of Crop Pests Economic Importance of Crop Pests Classification of Insect Pests and their Economic Importance Agricultural Machines and their Uses Soil Erosion: Causes of Soil Erosion Ways to prevent Soil Erosion Asexual 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 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
Academic Questions in Agricultural Science
Cordage is made from _____ crop.
F. Vegetables and Spice
_____ is defined as the solid and arable part of the earth where agricultural activities are be carried out.
C. Agricultural land
E. Open land
F. Planting and grazing land
Gymnosperms and angiosperms are seed bearing plants under the division spermatophyta?
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
In flowering plants, fertilization occurs when the _____ comes into contact with the ova (as genetic materials are eventually exchanged).
F. Pollen grain
The fusion of sperm and ova in animals leads to the formation of _____.
LEN ACADEMY SMART SCHOOL SOFTWARE
Read more on its smart academic features here
Please click here to kindly support education
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.
Note: Gymnosperms and Angiosperms are siphonogamous plants. This means that they both produce pollen grains.
In this article, we will look at the reproductive differences between gymnosperms and angiosperms.
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.
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.
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.
Please click here to follow Len Academy on Google News.
Please like and follow our official facebook page here for great educational write-ups.
You can follow Len Academy on twitter here.Thank you.
Kindly share this article via the links below:
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.
CONTRIBUTE TO THIS TOPIC | ASK A QUESTION
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:
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.
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.
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.