The website has the complete lesson note for all the subjects in secondary school but this piece showcases the SS3 Biology Lesson Note on Development of New Seeds. You can use the website search button to filter out the subject of interest to you.
CLICK HERE to download the complete Document: DOWNLOAD HERE
TOPIC: DEVELOPMENT OF NEW SEEDS
CONTENT:
SUB-TOPIC I: PROGRESS OF DEVELOPMENT OF ZYGOTE IN THE FLOWERING PLANT
Meaning of seed
Seeds are plant parts containing embryo and this embryo give rise to new individual.
Pollination is the first step in the process of sexual reproduction in flowering plants. It is followed by fertilization and development of zygote. These steps change the flower into a fruit enclosing seeds, the potential next plant
Pollination: this is the process whereby mature pollen grains are transferred from the anthers to the mature stigmas or pollination is the transfer of pollen grains from the anther to the mature stigma of a flower.
There are two types of pollination, they are:
Bumblebee Pollinating
When a bee such as this bumblebee visits a flower, tiny grains called pollen stick to the bee. The bee then carries the pollen to another flower. This process, known as pollination, is necessary for many plants to make seeds and fruit.
Cross Pollination
Cross pollination occurs when the pollen grains from one flower are transferred to the mature stigma of another plant of the same species.
Features Of Cross Pollination
(a) The stamens ripening before the stigmas (flower is described as being protandrous e.g. sunflower, sativa)
(b) The stigmas ripening before the stamen (protogynous e.g. grasses)
Self Pollination
Self pollination occurs when the pollen grains from a flower are transferred to the mature stigma of the same plant of the same species.
Features of Self-Pollinated Flowers
Click on the Downloadable Button to get the FULL NOTE
Veterinary medicine is the branch of medicine that deals with the prevention, diagnosis, and treatment…
Anthropology is the scientific study of human beings and their cultures. It encompasses a wide…
Sociology is the scientific study of human society, culture, and behavior. It examines the social…
Social Work is a profession dedicated to helping individuals, families, and communities to cope with…
Religious studies is an academic discipline that explores the beliefs, practices, and history of various…
Public administration is the field of study and practice that focuses on the organization and…