Unit 14 Plants Gymnosperms Notes
... Each contained in an ovule and produces archegonia with egg cells Pollen is carried by the wind to the ovule The gametophyte contained in the pollen grain produces a pollen tube This grows into the archegonium and provides a path for the sperm to reach the egg. Occurs without water ...
... Each contained in an ovule and produces archegonia with egg cells Pollen is carried by the wind to the ovule The gametophyte contained in the pollen grain produces a pollen tube This grows into the archegonium and provides a path for the sperm to reach the egg. Occurs without water ...
Biology 3B Laboratory Vascular Seed Plants – Gymnosperm
... pollen grains develop. The pollen grains house the cells that develop into haploid sperm. The anther is supported by the stalk-like structure called the filament. Once the pollen grain leaves the anther, it is bound for the stigma (whether on another flower or plant or the same flower or plant). Th ...
... pollen grains develop. The pollen grains house the cells that develop into haploid sperm. The anther is supported by the stalk-like structure called the filament. Once the pollen grain leaves the anther, it is bound for the stigma (whether on another flower or plant or the same flower or plant). Th ...
Diversity
... The major groups are shown. After sponges (Parazoa) diverge, leaving all other animals (Eumetazoa), differences in symmetry reveal two groups (Radiata, Bilateria). Embryonic differences within the Bilateria are diagnostic for the Protostomia and Deuterostomia. The subgroups of protostomes are the Ec ...
... The major groups are shown. After sponges (Parazoa) diverge, leaving all other animals (Eumetazoa), differences in symmetry reveal two groups (Radiata, Bilateria). Embryonic differences within the Bilateria are diagnostic for the Protostomia and Deuterostomia. The subgroups of protostomes are the Ec ...
Plants junior
... Flowering plants also have a stem, leaves and roots. The roots and leaves contain the xylem, a tissue necessary for the transport of water and mineral salts, and the phloem that distributes the nutrients produced by the plant. Each part of the plant has a different function: roots help to anchor the ...
... Flowering plants also have a stem, leaves and roots. The roots and leaves contain the xylem, a tissue necessary for the transport of water and mineral salts, and the phloem that distributes the nutrients produced by the plant. Each part of the plant has a different function: roots help to anchor the ...
The Plant Kingdom
... • Plant cells produce their own food through a process called photosynthesis. • Photosynthesis allows plants to convert light energy into food energy. (write the equation) ...
... • Plant cells produce their own food through a process called photosynthesis. • Photosynthesis allows plants to convert light energy into food energy. (write the equation) ...
The Plant Kingdom
... • Plant cells produce their own food through a process called photosynthesis. • Photosynthesis allows plants to convert light energy into food energy. (write the equation) ...
... • Plant cells produce their own food through a process called photosynthesis. • Photosynthesis allows plants to convert light energy into food energy. (write the equation) ...
Plant Classification – Part 2
... use of wind pollination. Therefore they do not contain bright, colourful petals to attract insects, as this is not required. Grass plants produce high levels of pollen to increase its chances of reproduction – this high level of pollen can cause hay fever. Grass flowers are said to be hermaphr ...
... use of wind pollination. Therefore they do not contain bright, colourful petals to attract insects, as this is not required. Grass plants produce high levels of pollen to increase its chances of reproduction – this high level of pollen can cause hay fever. Grass flowers are said to be hermaphr ...
Gymnosperms - National Botanic Gardens
... In gymnosperms the endosperm grows from a spore (a cell with half the number of chromosomes – n). Pollination may occur when the cone is small, but the endosperm continues to grow to completion before fertilisation occurs. When fully grown the endosperm develops archegonia in which single large nucl ...
... In gymnosperms the endosperm grows from a spore (a cell with half the number of chromosomes – n). Pollination may occur when the cone is small, but the endosperm continues to grow to completion before fertilisation occurs. When fully grown the endosperm develops archegonia in which single large nucl ...
Big Idea 16 - Flowering Plant Reproduction and Life Cycle
... Pollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma. • Pollen lands on a female pistil, sperm cells move down to the ovary, fertilizing the egg cells. • Fertilization combines DNA. • The result is a seed with a tiny plant inside. • The ovary g ...
... Pollination is the act of transferring pollen grains from the male anther of the stamen to the female stigma. • Pollen lands on a female pistil, sperm cells move down to the ovary, fertilizing the egg cells. • Fertilization combines DNA. • The result is a seed with a tiny plant inside. • The ovary g ...
Seeds and their advantages
... – Protection: Hard shell • 3) Allow dispersal – Carried by wind, water, animals ...
... – Protection: Hard shell • 3) Allow dispersal – Carried by wind, water, animals ...
Vascular plants
... Ferns, club mosses and horsetails have vascular tissue but do not produce seeds; instead they reproduce by releasing spores. ...
... Ferns, club mosses and horsetails have vascular tissue but do not produce seeds; instead they reproduce by releasing spores. ...
Fundamentals of Genetics
... transmitted from parents to their offspring Gregor Johann Mendel founded this ...
... transmitted from parents to their offspring Gregor Johann Mendel founded this ...
Chapter 38
... The petals form the corolla and attract animals to assist in pollination. Petals may or may not be present. The stamens are the male reproductive organs. ...
... The petals form the corolla and attract animals to assist in pollination. Petals may or may not be present. The stamens are the male reproductive organs. ...
Ch.24 - Jamestown School District
... Flowers are reproductive organs composed of 4 kinds of specialized leaves: sepals, petals, stamens, & carpals ...
... Flowers are reproductive organs composed of 4 kinds of specialized leaves: sepals, petals, stamens, & carpals ...
PDF version
... fern conifer angiosperm For plants that do not require free water for fertilization, how do the sperm get to the egg? Some seeds are dormant until stratification takes place. What is stratification? Why is it an important dormancy mechanism? Give one example of each of the following types of fruit: ...
... fern conifer angiosperm For plants that do not require free water for fertilization, how do the sperm get to the egg? Some seeds are dormant until stratification takes place. What is stratification? Why is it an important dormancy mechanism? Give one example of each of the following types of fruit: ...
Biology 112 - Unit 2E - Seed Plants.notebook
... Seed Plants (Page 564) Seed plants are divided into two groups. Seed Plants ...
... Seed Plants (Page 564) Seed plants are divided into two groups. Seed Plants ...
Gymnosperms
... Origin of Pollen (cont.) • Pollen grains (male gametophytes) are released from the “strobilus” or “cone” • The pollen grains germinate forming a pollen tube • The generative cell divides to form sperm nuclei which travel down the pollen tube to fertilize the egg ...
... Origin of Pollen (cont.) • Pollen grains (male gametophytes) are released from the “strobilus” or “cone” • The pollen grains germinate forming a pollen tube • The generative cell divides to form sperm nuclei which travel down the pollen tube to fertilize the egg ...
The Life Cycle of a Plant
... Birds are important pollinators, too, especially of wildflowers. For example, hummingbirds have perfectly designed beaks that can reach the nectar inside long, tubular-shaped flowers. There are more than 2,000 different kinds of birds in the world that feed on nectar. Birds have a poor sense of smel ...
... Birds are important pollinators, too, especially of wildflowers. For example, hummingbirds have perfectly designed beaks that can reach the nectar inside long, tubular-shaped flowers. There are more than 2,000 different kinds of birds in the world that feed on nectar. Birds have a poor sense of smel ...
Guide to insects - UofMHealthBlogs.org
... any of our favorite fruits! Pollination occurs when pollen is taken from flower to flower; this may eventually lead to fruit and seed development. Often pollinators have a very specific relationship with their plants – some animals prefer certain shapes, colors, and smells of flowers, so we can gues ...
... any of our favorite fruits! Pollination occurs when pollen is taken from flower to flower; this may eventually lead to fruit and seed development. Often pollinators have a very specific relationship with their plants – some animals prefer certain shapes, colors, and smells of flowers, so we can gues ...
seed - Knox
... - may include some additional tissues as well - protects seeds & often enhances dispersal - may be fleshy or dry ...
... - may include some additional tissues as well - protects seeds & often enhances dispersal - may be fleshy or dry ...
Plant Revision Sheet
... (c) Some plants are pollinated by the action of the wind rather than by insects. Explain the general characteristics of the flowers of wind pollinated plants. (d) Discuss the movement of pollen from the flower it was produced in to an ovule. (e) For 2 plants you have studied / talked about throughou ...
... (c) Some plants are pollinated by the action of the wind rather than by insects. Explain the general characteristics of the flowers of wind pollinated plants. (d) Discuss the movement of pollen from the flower it was produced in to an ovule. (e) For 2 plants you have studied / talked about throughou ...
Chapter 22: Introduction to Plants
... haploid spores by meiosis Spores grow into multicellular haploids called gametophytes Gametophytes produce gametes – egg and sperm Zygote forms through fertilization, which develops into new sporophyte ...
... haploid spores by meiosis Spores grow into multicellular haploids called gametophytes Gametophytes produce gametes – egg and sperm Zygote forms through fertilization, which develops into new sporophyte ...
Topic 4: Plant Diversity II
... 1. pine tree is sporophyte, with sporangia located on cones 2. gametophyte generations reduced; retained within sporangia male gametophyte is pollen grain (no antheridium) female gametophyte produces archegonia within ovule 3. heterosporous: separate male and female cones 4. male cones (pollen c ...
... 1. pine tree is sporophyte, with sporangia located on cones 2. gametophyte generations reduced; retained within sporangia male gametophyte is pollen grain (no antheridium) female gametophyte produces archegonia within ovule 3. heterosporous: separate male and female cones 4. male cones (pollen c ...
Pollination
Pollination is a process by which pollen is transferred from the anther to the stigma of the plant, thereby enabling fertilization and reproduction. It is unique to the angiosperms, the flower-bearing plants.In spite of a common perception that pollen grains are gametes, like the sperm cells of animals, this is incorrect; pollination is an event in the alternation of generations. Each pollen grain is a male haploid gametophyte, adapted to being transported to the female gametophyte, where it can effect fertilization by producing the male gamete (or gametes), in the process of double fertilization). A successful angiosperm pollen grain (gametophyte) containing the male gametes is transported to the stigma, where it germinates and its pollen tube grows down the style to the ovary. Its two gametes travel down the tube to where the gametophyte(s) containing the female gametes are held within the carpel. One nucleus fuses with the polar bodies to produce the endosperm tissues, and the other with the ovule to produce the embryo Hence the term: ""double fertilization"".In gymnosperms, the ovule is not contained in a carpel, but exposed on the surface of a dedicated support organ, such as the scale of a cone, so that the penetration of carpel tissue is unnecessary. Details of the process vary according to the division of gymnosperms in question.The receptive part of the carpel is called a stigma in the flowers of angiosperms. The receptive part of the gymnosperm ovule is called the micropyle. Pollination is a necessary step in the reproduction of flowering plants, resulting in the production of offspring that are genetically diverse.The study of pollination brings together many disciplines, such as botany, horticulture, entomology, and ecology. The pollination process as an interaction between flower and pollen vector was first addressed in the 18th century by Christian Konrad Sprengel. It is important in horticulture and agriculture, because fruiting is dependent on fertilization: the result of pollination. The study of pollination by insects is known as anthecology.