Angiosperms are the most diverse group of flowering seed-producing land plants. They have key characteristics including ovules enclosed in a carpel structure made of an ovary and stigma, double fertilization leading to endosperm formation, stamens with two pairs of pollen sacs, and phloem tissue composed of sieve tubes and companion cells. The parts of an angiosperm include roots that absorb water and nutrients underground, various stem types like stolons and rhizomes, and leaves that can be simple or compound and arranged alternately, opposite, or whorled on the stem. Angiosperms are divided into monocots and dicots based on whether their seeds have one or two coty
The manner of distribution of placentae on the ovary wall is called placentation
the presentation includes the types and details about the placentation along with photos and labled diagrams.
the floral formula tells us about the nature of flowers. the floral diagram represents the plan of arrangements of floral whorl in relation to the mother axis.
This ppt contains all about the family Rosaceae under Dicotyledons. It explains about its systematic position, general characters, phylogenetic affinities, floral formula and diagram, economic importance and important genera under this family.
* The Gymnosperms originated in the Devonian period of the Palaeozoic Era and formed the supreme vegetation in the Mesozoic Era.
* It was Robert Brown (1827) who first recognised gymnosperms as a separate entity among plant kingdom.
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed.
* The members of this family are mainly distributed in the tropical parts of the world. The plants occur mostly in dry regions.
* Several shrubby species of Capparis occur in the Mediterranean region.
* Reference - Taxonomy of Angiosperms - Dr. B. P. Pandey
The manner of distribution of placentae on the ovary wall is called placentation
the presentation includes the types and details about the placentation along with photos and labled diagrams.
the floral formula tells us about the nature of flowers. the floral diagram represents the plan of arrangements of floral whorl in relation to the mother axis.
This ppt contains all about the family Rosaceae under Dicotyledons. It explains about its systematic position, general characters, phylogenetic affinities, floral formula and diagram, economic importance and important genera under this family.
* The Gymnosperms originated in the Devonian period of the Palaeozoic Era and formed the supreme vegetation in the Mesozoic Era.
* It was Robert Brown (1827) who first recognised gymnosperms as a separate entity among plant kingdom.
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed.
* The members of this family are mainly distributed in the tropical parts of the world. The plants occur mostly in dry regions.
* Several shrubby species of Capparis occur in the Mediterranean region.
* Reference - Taxonomy of Angiosperms - Dr. B. P. Pandey
Presentation on Gymnosperms. Prepared by Rahmat Alam Puniyali, Student of BS IV at Karakoram International University Gilgit, Pakistan. Photos of related plants are taken by the creator at KIU (Karakoram International University) campus.
(Some of the pictures and diagrams are taken from the websites of their resembling organizations (The McGraw-Hill Companies))
All you need to know about angiosperms, the parts of a flower, sexual reproduction in plants and types of fruits.
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BIOLOGY STD 11
SANJAY SIDDHAPURA
HELPFUL FOR NEET/ GSET/NET EXAMINATION PREPARATION
ROOT, STEM, LEAVES, FLOWER, FRUIT, SEED, EMBRYO, FAMILY DISCRIPTION AVAILABLE IN THIS PRESENTATION
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
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Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
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2. What are Angiosperms???
• The flowering
plants (angiosperms), also
known
as Angiospermae or Magnolio
phyta, are the most diverse group
of land plants. Angiosperms
are seed-producing plants .
3. Parts Of Angiosperms
• The parts of an Angiosperm include:
• Roots, which are generally underground and serve to absorb
water and nutrients
• Stems, which come in various types such as:
– stolon, an above-ground “runner”
– rhizome, an underground “runner”
– bulb, a fleshy stem modified for nutrient storage
• Leaves, which can be either simple or compound in form
and which alternate with each other going up the stem or
can be arranged opposite each other on the stem or
as whorled leaves where more than two originate from the
same place on the stem
4. Characteristics Of Angiosperms
• Despite their diversity, angiosperms are clearly united by
a suite of synapomorphies (i.e., shared, derived
features) including:
• 1) ovules that are enclosed within a carpel, that is, a
structure that is made up of an ovary, which encloses the
ovules, and the stigma, a structure where pollen
germination takes place,
• 2) double fertilization, which leads to the formation of an
endosperm (a nutritive tissue within the seed that feeds
the developing plant embryo),
• 3) stamens with two pairs of pollen sacs,
• 4) features of gametophyte structure and development,
and
• 5) phloem tissue composed of sieve tubes and
companion cells
6. Cotyledons
• Plant embryos in seeds have structures
called cotyledons. Cotyledons are called
‘seed leaves’ because in many instances
they emerge and become green when the
seed germinates.
7. Division Of Angiosperms
• The angiosperms are divided into two
groups on the basis of the number of
cotyledons present in the seed .
• Plants with seeds having a single
cotyledon are called monocotyledonous or
monocots
• Plants with seed having two cotyledons
are called dicots.