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Ch_38 plant reproduction
Ch_38 plant reproduction

... carpels = female reproductive organs  ovary at the base  slender neck = style  within the ovary are 1 or more ovules  within ovules are embryo sacs  female gametophyte = embryo sac ...
Tree Identification
Tree Identification

... Š Growth occurs only from meristem tissue (cambium, stem and root tips). Š Early (spring) wood is light and softer. Š Late (summer) wood is dark and denser. Š 1 light + 1 dark ring = 1 year’s growth ...
bryophytes - faculty.fairfield.edu
bryophytes - faculty.fairfield.edu

... evolution of vascular tissue was a key adaption for living on land. Seeds were another major adaptation. Not only did seeds allow for long distance dispersal but also allowed for survival during harsh environmental conditions such as drought, fire, or extreme cold. Based on fossil records, gymnosper ...
Plant Class Sp 2010/30C2-Angiosperms (Organismal)
Plant Class Sp 2010/30C2-Angiosperms (Organismal)

... 3. Fruits help disperse the seeds of angiosperms 4. The life cycle of angiosperms is a highly refined version of the alternation of generations common to all plants 5. The radiation of angiosperms marks the transition from the Mesozoic era to the Cenozoic era 6. Angiosperms and animals have shaped o ...
Angiosperms - OpenStax CNX
Angiosperms - OpenStax CNX

... fruits have burs and hooks to cling to fur and hitch rides on animals. ...
What can be smaller than a pea, but grow as big as a tree? A seed
What can be smaller than a pea, but grow as big as a tree? A seed

... Given the right conditions, any seed can give rise to a new plant. Seeds have some basic parts in common. Every seed has a protective coat, some stored food, and an embryo that is the beginning of a new plant. Most seed embryos have a tiny root (radicle), a stem (plumule), and one or more leaflike p ...
HOW DO ORGANISMS REPRODUCE
HOW DO ORGANISMS REPRODUCE

... The embryo sac is surrounded by two protective membranes. The embryo sac grows and its nucleus undergoes repeated mitotic divisions until eight nuclei are produced. Thus a mature embryo contains eight nuclei out of which one is female gamete called ovule. The eight nuclei of embryo sac are present i ...
12. Plant identification - New Zealand Plant Conservation Network
12. Plant identification - New Zealand Plant Conservation Network

... 3 = kauri/kawaka group—dry cone group 5 = celery pine group 9 = tötara group—needle-leaved podocarp group 10 = matai/miro—plum-fruited podocarp group 11 / 12 (and 2 (b)0 = rimu-like group for convenience—scale leaved podocarp group 1. (a) Trees or shrubs with part of the cone or seed fleshy. ...
Lecture 6B
Lecture 6B

... is made up of a generative cell and a tube cell – pollen grain = generative cell + tube cell + spore wall – pollen dispersed and lands on the stigma – the tube cell elongates to form the pollen tube – as the tube grows - the generative cell divides to form 2 sperm (n) = pollen ...
Pruning Part II - Oregon State University Extension Service
Pruning Part II - Oregon State University Extension Service

... Rhus typhina (staghorn sumac) ...
Angiosperm Reproduction and Biotechnology - jj-sct
Angiosperm Reproduction and Biotechnology - jj-sct

... © 2014 Pearson Education, Inc. ...
video slide
video slide

... Pacific yew. The bark of Pacific yew (Taxa brevifolia) is a source of taxol, a compound used to treat women with ovarian cancer. The leaves of a European yew species produce a similar compound, which can be harvested without destroying the plants. Pharmaceutical companies are now refining techniques ...
Pollination Activity
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... plant species. This would increase pollination success, because pollen grains do not have to travel as far to land on a stigma of the same species -DID YOU MAXIMIZE YOUR FERTILIZATION SUCCESS?? -Each individual may have up to FOUR fruits if they collect FOUR pollen grains from the same species -Also ...
video slide - Course
video slide - Course

... can also include other flower parts. • Fruits protect seeds and aid in seed dispersal. ...
30_Plant Diversity II The Evolution of Seed Plants
30_Plant Diversity II The Evolution of Seed Plants

... • Seeds provide some evolutionary advantages over spores – They may remain dormant for days to years, until conditions are favorable for germination – Seeds have a supply of stored food – They may be transported long distances by wind or animals – Protected by integuments ...
Seed Plants: Angiosperms
Seed Plants: Angiosperms

... The seed forms in an ovary, which enlarges as the seeds grow. As the seed develops, the walls of the ovary also thicken and form the fruit. In botany, a fruit is a fertilized and fully grown, ripened ovary. Many foods commonly called vegetables are actually fruit. Eggplants, zucchini, string beans, ...
BSCI 442
BSCI 442

... Flowering plants reproduce sexually and have an alternation of generations. The life cycle of flowering plants involves the alternation of a diploid sporophyte stage and haploid gametophyte stage. The haploid gametophyte generation in flowering plants is very reduced and is enclosed within and depen ...
16 EVOLUTION OF PLANTS
16 EVOLUTION OF PLANTS

... B. We are most familiar with the conifers whose needlelike leaves help resist water loss for these among the oldest and largest trees on earth. C. The Life of a Gymnosperm 1. Conifers form two kinds of cones: seed cones that bear female gametophytes and pollen cones that produce male gametophytes. 2 ...
File
File

... • Discuss the stages in seedling growth? • MA: Describe an investigation of the effect of water, oxygen and temperature on seed germination • MA: Describe an investigation to use starch agar or skimmed milk plates to show digestive activity during germination ...
Structure of Flower
Structure of Flower

... gametophytes, are generally much larger than pollen cones. Near the base of each scale are two ovules in which the female gametophytes develop. Within the ovules, meiosis produces haploid cells that grow and divide to produce female gametophytes. These gametophytes may contain hundreds or thousands ...
Angiosperms - flowering plants
Angiosperms - flowering plants

... Four microspores result from each division- these are Haploid (1n). Tapetum – nutritive tissue (also lays down the sporopollenin walls) ...
- ISpatula
- ISpatula

... In gymnosperms, two sperm are discharged into the pollen tube. The sperm of some gymnosperms have flagella. Gymnosperms only have one integument. ...
Diversity of Plant Life
Diversity of Plant Life

... Normally, two ovules are borne on each cone scale. Recall from the life cycle of angiosperms that the ovule is a megasporangium surrounded by integuments, with an opening, the micropyle, facing the central axis. Meiosis produces four megaspores within each ovule, but three degenerate. The one surviv ...
Monocots vs. Dicots - Mrs. Kunze Biology Web Site
Monocots vs. Dicots - Mrs. Kunze Biology Web Site

... There are two types of Vascular Plants that produce Seeds: Angiosperms & Gymnosperms Angiosperm seeds develop within a flower. Angiosperms can be divided into two groups called Monocots and Dicots ...
Primary Upper Block Cycles: Reproduction in Plants Introduction to
Primary Upper Block Cycles: Reproduction in Plants Introduction to

... There are plants which have developed behavioural adaptations in order to survive in the harsh environment where they live in. An example is the pine tree which disperses its seeds by fire. The cones of the pine tree which contain the seeds are usually closed. They only open up when they experience ...
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Pinophyta



The conifers, division Pinophyta, also known as division Coniferophyta or Coniferae, are one of 12 extant division-level taxa within the Kingdom Plantae (Viridiplantae) and 10 within the extant land plants. Pinophytes are gymnosperms, cone-bearing seed plants with vascular tissue. All extant conifers are woody plants with secondary growth, the great majority being trees with just a few being shrubs. Typical examples of conifers include cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews. The division contains approximately eight families, 68 genera, and 630 living species.Although the total number of species is relatively small, conifers are of immense ecological importance. They are the dominant plants over huge areas of land, most notably the boreal forests of the northern hemisphere, but also in similar cool climates in mountains further south. Boreal conifers have many wintertime adaptations. The narrow conical shape of northern conifers, and their downward-drooping limbs, help them shed snow. Many of them seasonally alter their biochemistry to make them more resistant to freezing, called ""hardening"". While tropical rainforests have more biodiversity and turnover, the immense conifer forests of the world represent the largest terrestrial carbon sink, i.e. where carbon from atmospheric CO2 is bound as organic compounds.They are also of great economic value, primarily for timber and paper production; the wood of conifers is known as softwood.Conifer is a Latin word, a compound of conus (cone) and ferre (to bear), meaning ""the one that bears (a) cone(s)"".
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