Science Class: Lesson 3 - Classification and Reproduction of Plants PDF

Good Day! Welcome to Science Class OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Trias, Cavite  Lesson 3: Classification and Reproduction of Plants  Identify the characteristics of cone-bearing plants.  Cite examples of cone-bearing pla...

Good Day! Welcome to Science Class OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Trias, Cavite  Lesson 3: Classification and Reproduction of Plants  Identify the characteristics of cone-bearing plants.  Cite examples of cone-bearing plants.  Differentiate monocot from dicot.  How cone-bearing plants reproduce.  Plant Kingdom Non-flowering Plants Flowering Plants BryophytesFerns Gymnosperms Angiosperm OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Classification of Plants Vascular Plants Non-vascular Plants Seeded Seedless Bryophytes Vascular Vascular Plants Plants Gymnosperms Ferns Angiosperm OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Classification of Plants Bryophytes Tracheophytes 1. Nonvascular plants 1. Have TRUE roots, stem, and 2. They are small and have NO leaves. TRUE roots, stem, and leaves. 2. Equipped with vascular 3. Examples include moss, tissue such as xylem liverworts, and hornworts. (carrying water) and the 4. Grow in the moist environment phloem (food carrying) OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Modes of Reproduction in Plants  Spore – bearing Plants OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Spore-bearing Plants o Spore-bearing plants are plants that reproduce through spreading spores. o Fertilization occurs after spores. o They land in a suitable environment where they can grow into a gametophyte. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Spore-bearing Plants o Spore-bearing plants are divided into lower form (bacteria, fungi, algae) and higher form (fern, club mosses, horsetails). OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Mosses, Liverworts and Hornworts oMosses are soft and spongy plants that have leaves and stalks. o They bear capsule that contain spores. o Mosses usually grow in clumps and spread like mats, anchoring themselves into the soil and rocks by using root-like parts called rhizoids. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Mosses, Liverworts and Hornworts oLiverworts have vegetative body that is flat and leaf-like. This body is called thallus, which contain male and female organs. o In some species of liverworts, the thallus contains gemmae cups that serves as means of asexual propagation. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Mosses, Liverworts and Hornworts oHornworts sometimes called horned liverworts, are named after their tapered horn structure called sporophyte. o They are usually found in damp, shady, and rocky surroundings. o They may also be found in ponds, streams, and riverbanks. o Their spores are stored in the sporangium. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Ferns oFerns also reproduce through spores. They have leaves, stems, and roots. o The leaves of ferns are known as fronds. The underside of the frond is where the spores are attached. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Ferns OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Club Mosses oClub Mosses also reproduce via spores. Their sporophyte have true roots and stems and scale-like leaves which are small and are arranged in a spiral on long stem. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Club Mosses o The stems of club mosses grow shoots that contain cone-like structures which hold the pores. When the pores is spread by the agents of pollination they will germinate on fertile soil and develop thalli. o The thalli are the plants gametophytes which will produce male and female reproductive cells. o The gametophyte stage of club mosses may take 15 years to complete before they can form new plants. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General CONE-BEARING PLANTS OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Cone-bearing Plants  Plants that have cones with seeds this plant is known as gymnosperm.  Also known as naked-seeded plants because the fruit is not protected inside the fruit.  Two types of cone-bearing plants: the female cone and the male cone.  Gingko, conifers, gnetophytes, and cycads are examples of this group. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Mode of Reproduction  The reproduction of cone-bearing plants starts when a pollen grain from a pollen sac on the male cone floats through the air to the scale of female cone.  A pollen tube grows from the pollen grain toward the female ovule. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Mode of Reproduction  The sperm cells move through the tube and fertilizes an egg cell, which then develops into a seed.  The seeds then float to the ground and starts to develop. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Cycads Woody, palm-like plants that grow up to one-meter in height. They are usually found in the tropical or warm regions. They have tuberous roots that are thick and fleshy so that they can store water and adapt to the temperature of their environment. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Gingkos Gnetophytes are seed-bearing plants that are distributed widely from moist, tropical surroundings to very arid desserts. They are mostly shrubs or woody vines that have leaves. Welwitschia Ephedra OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General  Conifers Most conifers have seeds on the surfaces of their scales, forming seed cones. All conifers have separate seed cones and pollen cones. These may be born either on the same tree or different tree. Female cones grow in the upper branches where they may be fertilized by pollen blown by the wind from the male cones. Male cones grow in the lower branches. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General The pollen of conifers is carried by the wind and other pollinators to fertilize the ovule. When an ovule is fertilized, winged seeds will be produced. They find a suitable environment where they can germinate and grow. Winged -seeds OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General ANGIOSPERM OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General ANGIOSPERM o Angiosperm are vascular plants which are classified into monocot and dicot based on numbers of cotyledon. o Monocot plants have one cotyledon, whereas dicot plants have two cotyledons. o Plants like grass, corn, and rice are monocot. o Guava and apple are dicot. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General ANGIOSPERM OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Mode of reproduction (Angiosperm) oFlowering plants are plants that develop flowers. oFlowers are composed of parts such as ovaries (becomes fruits) and ovules (become seeds). OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Mode of reproduction (Angiosperm) oFour main parts of flowers. Parts of Flowers Sepals Petals Stamen Pistil  Leaf-like structure  Colorful parts of  The male reproductive  The female reproductive that protect the flowers that attract organ of a flower that is organ of the flower flower bud. pollinators like bees composed of filament composed of the stigma,  Also considered as so that the flowers and anther. style, and ovary. modified leaves may be pollinated.  The anther holds the  The stigma is the top of which comprise the  Petals and sepals pollen grains. the pistil where calyx. are attached to the pollination occurs. flower stalk called  The style connects the peduncle. stigma to the ovary.  The ovary is the part that turns into fruit. OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General Mode of reproduction (Angiosperm) OUR LADY OF THE HOLY ROSARY SCHOOL Pasong Kawayan 1, General