![Gymnosperms](http://s1.studyres.com/store/data/008144776_1-126d3d237ecb6a17cbde8f263432c8cd-300x300.png)
Gymnosperms
... Gymnosperm diversity -ca. 15 families, 75-80 genera, ca. 900 species -4 monophyletic lineages -all woody -mostly without effective vegetative reproduction -only tracheids in the xylem (except for gnetophytes, which also have vessels) -naked seeds -relatively slow sexual reproduction -worldwide but ...
... Gymnosperm diversity -ca. 15 families, 75-80 genera, ca. 900 species -4 monophyletic lineages -all woody -mostly without effective vegetative reproduction -only tracheids in the xylem (except for gnetophytes, which also have vessels) -naked seeds -relatively slow sexual reproduction -worldwide but ...
Allergic reactions
... inappropriately to common substances such as dust, mold, pollen, or certain foods. Antigens that cause allergic reactions are called allergens. The immune system begins making a special type of antibody to these substances, which under normal conditions would not stimulate the immune system. These a ...
... inappropriately to common substances such as dust, mold, pollen, or certain foods. Antigens that cause allergic reactions are called allergens. The immune system begins making a special type of antibody to these substances, which under normal conditions would not stimulate the immune system. These a ...
Plant Classification (Nonvascular)
... nutrients by photosynthesis. They have plastids which contain chlorophyll A, Chlorophyll B, and carotenoids and the cells have walls consisting of Cellulose. Natural History – Plantae belong to the Supergroup Archaeoplastida whose members engulfed a cyanobacteria. The first plants appear in the foss ...
... nutrients by photosynthesis. They have plastids which contain chlorophyll A, Chlorophyll B, and carotenoids and the cells have walls consisting of Cellulose. Natural History – Plantae belong to the Supergroup Archaeoplastida whose members engulfed a cyanobacteria. The first plants appear in the foss ...
Ch. 22
... • The seed is a crucial adaptation to life on land because it protects the embryonic plant when it is at its most vulnerable stage • Seed plants produce two kinds of gametophytes, male and female, which develop completely within the sporophyte male gametophytes are called pollen grains • they aris ...
... • The seed is a crucial adaptation to life on land because it protects the embryonic plant when it is at its most vulnerable stage • Seed plants produce two kinds of gametophytes, male and female, which develop completely within the sporophyte male gametophytes are called pollen grains • they aris ...
PPT
... nutrients by photosynthesis. They have plastids which contain chlorophyll A, Chlorophyll B, and carotenoids and the cells have walls consisting of Cellulose. Natural History – Plantae belong to the Supergroup Archaeoplastida whose members engulfed a cyanobacteria. The first plants appear in the foss ...
... nutrients by photosynthesis. They have plastids which contain chlorophyll A, Chlorophyll B, and carotenoids and the cells have walls consisting of Cellulose. Natural History – Plantae belong to the Supergroup Archaeoplastida whose members engulfed a cyanobacteria. The first plants appear in the foss ...
Lecture 09, Gymnosperms - Cal State LA
... Sporophylls: modified leaves that contain sporangia (spore-producers) FEMALE megasporangium ...
... Sporophylls: modified leaves that contain sporangia (spore-producers) FEMALE megasporangium ...
Pollen grains are produced by
... Name three ways that new plants are produced by vegetative reproduction. ...
... Name three ways that new plants are produced by vegetative reproduction. ...
Seeds Embryo (new sporophyte) (2n)
... growing seasons. In the first season, they germinate and grow roots, short stems, and sometimes leaves. In the second year, they grow new stems and leaves, produce flowers and seeds, and die. • Perennials – live for more than two growing seasons. ...
... growing seasons. In the first season, they germinate and grow roots, short stems, and sometimes leaves. In the second year, they grow new stems and leaves, produce flowers and seeds, and die. • Perennials – live for more than two growing seasons. ...
Kingdom Plantae
... 2. Sequence of steps for plants with seeds (reproduction) a. Anther produces pollen. b. Pollen is carried by wind or insects to stigma of a different flower. c. A tube grows from the pollen through the style to the ovary ...
... 2. Sequence of steps for plants with seeds (reproduction) a. Anther produces pollen. b. Pollen is carried by wind or insects to stigma of a different flower. c. A tube grows from the pollen through the style to the ovary ...
CHAPTER 30 THE PROTISTS
... 7. The cone-bearing gymnosperms and flowering angiosperms both produce seeds. a. Seeds are mature ovules and stored food within protective seed coat. b. Seeds are resistant to drought and somewhat resistant to predators. c. Gymnosperms appear about 400 million years ago, during the Devonian period. ...
... 7. The cone-bearing gymnosperms and flowering angiosperms both produce seeds. a. Seeds are mature ovules and stored food within protective seed coat. b. Seeds are resistant to drought and somewhat resistant to predators. c. Gymnosperms appear about 400 million years ago, during the Devonian period. ...
Plant Reproduction
... • Pollen grain takes in moisture and begins to germinate forming a pollen tube • Pollen tube extends down toward the ovary through the style • Tip of the pollen tube enter the ovary and penetrates through the micropyle opening in the ovule • Release the two sperm in the ovule ...
... • Pollen grain takes in moisture and begins to germinate forming a pollen tube • Pollen tube extends down toward the ovary through the style • Tip of the pollen tube enter the ovary and penetrates through the micropyle opening in the ovule • Release the two sperm in the ovule ...
Unit 10 Plants
... 1. The ___ had the most transpiration, because... 2. The ___ had the least transpiration, because... ...
... 1. The ___ had the most transpiration, because... 2. The ___ had the least transpiration, because... ...
4.4 Plants
... #2 above – Several ___________ surround the pistil. They are the _(male / female) part of the flower. 22) The first stage of the plant's reproductive process is: a. migration b. saturation c. pollination 23) Pollen grains can be carried by: a. wind b. insects c. birds d. all of the above 24) Some fl ...
... #2 above – Several ___________ surround the pistil. They are the _(male / female) part of the flower. 22) The first stage of the plant's reproductive process is: a. migration b. saturation c. pollination 23) Pollen grains can be carried by: a. wind b. insects c. birds d. all of the above 24) Some fl ...
Answers to Mastering Concepts Questions - McGraw
... But the plant would dry out (and eventually die) if the rate of water loss exceeded the rate at which water entered the plant through the roots. 4. Describe the reproductive adaptations of plants. Nonvascular plants and seedless vascular plants have swimming sperm, so sperm can reach egg in moist ha ...
... But the plant would dry out (and eventually die) if the rate of water loss exceeded the rate at which water entered the plant through the roots. 4. Describe the reproductive adaptations of plants. Nonvascular plants and seedless vascular plants have swimming sperm, so sperm can reach egg in moist ha ...
Chapter21
... What are the advantages of producing pollen? What are the advantages of producing seeds? ...
... What are the advantages of producing pollen? What are the advantages of producing seeds? ...
ANGIOSPERMS
... •Monochasium: consists of a single floral branch bearing flowers and ending in a single terminal flower (e.g. scorpioid and helicoid cymes). •Dichasium: each branch give rise to two more branches. •Polychasium : each branch give rise to many more branches. •Panicle: a compound raceme, i.e. one that ...
... •Monochasium: consists of a single floral branch bearing flowers and ending in a single terminal flower (e.g. scorpioid and helicoid cymes). •Dichasium: each branch give rise to two more branches. •Polychasium : each branch give rise to many more branches. •Panicle: a compound raceme, i.e. one that ...
Honey Bees Keep Out!
... (We had gone to this area because it was the site of the October 28, 1983 magnitude 7.3 earthquake that lifted Borah Peak seven feet from 12,655 feet to its current elevation of 12,662. My brother and I ended up sitting in the middle of the road taking photos of these fascinating flowers). Bees do vi ...
... (We had gone to this area because it was the site of the October 28, 1983 magnitude 7.3 earthquake that lifted Borah Peak seven feet from 12,655 feet to its current elevation of 12,662. My brother and I ended up sitting in the middle of the road taking photos of these fascinating flowers). Bees do vi ...
Flower Diagram Removed
... buds can be observed New parts grow and start growing bigger such as new stems, leaves, and the growth tip Growth - addition of new cells and the increase in their size Development - is the result of cells differentiating into a diversity of tissues that make up organs such as roots, shoots, l ...
... buds can be observed New parts grow and start growing bigger such as new stems, leaves, and the growth tip Growth - addition of new cells and the increase in their size Development - is the result of cells differentiating into a diversity of tissues that make up organs such as roots, shoots, l ...
6 slides
... 2) Cold: Seed must be exposed to prolong cold period • Seed doesn’t germinate in winter 3) Seed Coat Disruption: Seed must have coat broken • Seed doesn’t germinate off periods (e.g. dry) ...
... 2) Cold: Seed must be exposed to prolong cold period • Seed doesn’t germinate in winter 3) Seed Coat Disruption: Seed must have coat broken • Seed doesn’t germinate off periods (e.g. dry) ...
Chapter-21
... Diploid Stage double fertilization meiosis Haploid Stage Pollination and pollen Microspores ...
... Diploid Stage double fertilization meiosis Haploid Stage Pollination and pollen Microspores ...
Chapter 23: Plant Evolution
... Scales of pine cones are parts of a mature female cone in which megaspores formed and developed into female gametophyte Species of pines, fertilization occurs months or a year after pollination Pollen grains are released and land on the female ________ Pollen grains _______________ and grows ...
... Scales of pine cones are parts of a mature female cone in which megaspores formed and developed into female gametophyte Species of pines, fertilization occurs months or a year after pollination Pollen grains are released and land on the female ________ Pollen grains _______________ and grows ...
Evolution of the Flower
... in the course of evolution, given way to a single whorl at each level. The central axis of many flowers has shortened, and the whorls are close to one another. In some evolutionary lines, the members of one or more whorls have fused with one another, sometimes joining into a tube. In other kinds of ...
... in the course of evolution, given way to a single whorl at each level. The central axis of many flowers has shortened, and the whorls are close to one another. In some evolutionary lines, the members of one or more whorls have fused with one another, sometimes joining into a tube. In other kinds of ...
Structure and life processes in Plants
... •A flower may contain sepals, petals, stamens, and carpel (pistils). •Sepals cover and protect the flower parts when the flower is a bud. •Petals play an important role in attracting animal pollinators to the flower. •Stamens produce pollen grains. •Each pistil has three sections: a stigma, on which ...
... •A flower may contain sepals, petals, stamens, and carpel (pistils). •Sepals cover and protect the flower parts when the flower is a bud. •Petals play an important role in attracting animal pollinators to the flower. •Stamens produce pollen grains. •Each pistil has three sections: a stigma, on which ...
Plant Structure and Function
... The top part of the root grows upward and becomes the stem. The stem carries the seed coat and the seed leaves with it. The seed coat falls off. The seed leaves provide food for the plant. Two small leaves begin to grow from between the seed leaves. ...
... The top part of the root grows upward and becomes the stem. The stem carries the seed coat and the seed leaves with it. The seed coat falls off. The seed leaves provide food for the plant. Two small leaves begin to grow from between the seed leaves. ...
Pollen
![](https://commons.wikimedia.org/wiki/Special:FilePath/Tulip_Stamen_Tip.jpg?width=300)
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants. If pollen lands on a compatible pistil or female cone, it germinates, producing a pollen tube that transfers the sperm to the ovule containing the female gametophyte. Individual pollen grains are small enough to require magnification to see detail. The study of pollen is called palynology and is highly useful in paleoecology, paleontology, archaeology, and forensics.Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the anther of a flower to the stigma of the same flower.