2- Sketch the life cycle of a conifer- Include all relevant terms from.pdf
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2. Sketch the life cycle of a conifer. Include all relevant terms from p.10 of this chapter. One characteristic of Pinophytes (and many other non-flowering plants) worthy of note is their cones (which are actually strobili, the same structure observed in vascular non-seed plants like club mosses and horsetails). Non-flowering seed plants typically produce both male and female cones (the plants may either be monoecious or dioecious, depending on the lineage). Both male and female cones are formed of many scales (leaf-like structures) surrounding a central axis (the stem-like structure the scales emerge from); microsporangia or megasporangia are found at the base of the scales. The male cones contain numerous microsporangia that produce haploid microspores (there are typically hundreds of microspores produced per microsporangium; a microsporangium typically ends up looking like a large hollow sac containing hundreds of tiny free-floating microspores). These microspores grow into small (four-celled) microgametophytes; when the microgametophytes are mature they are called pollen grains. Female cones have ovules in them; each ovule contains a megasporangium surrounded by integument. The ovules of the female cones are typically found at the base of the cone's scales (which are typically much larger and stronger than the scales of male cones). The megasporangium produces megaspores that grow into megagametophytes. Each megagametophyte houses at least one archegonium, which develops an egg that is fertilized by the sperm from a pollen grain. The fertilized egg becomes a zygote, which eventually develops into a embryo (that is diploid) surrounded by the tissue of the meqagametophyte develops into a embryo (that is diploid) surrounded by the tissue of the megagametophyte (which develops into haploid nutritive tissue) and the megasporangium (which develops into the seed coat). A mature seed is composed of a seed coat surrounding nutritive tissue and the embryo; gymnosperm seeds do not have endosperm, and are not contained in a fruit. The seeds are released into the environment, where they can germinate and grow into a sporophyte plant..
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Life cycle of gymnosperms
1. Gymnosperms are naked seeded non-flowering plants that show alternation of generations between sporophyte and gametophyte stages. The sporophyte plant body is well differentiated into roots, stems, and leaves while the gametophyte is greatly reduced.
2. Gymnosperms reproduce sexually through cones that contain either microsporangia or megasporangia. Pollination occurs and pollen tubes carry sperm to fertilize eggs within the ovules, forming seeds with embryos.
3. The life cycle involves microspores forming male gametophytes that produce sperm, and megaspores forming reduced female gametophytes containing eggs. Fertilization occurs
Class 12||Chapter 2|| Sexual Reproduction in flowering plants
This chapter includes flowers, their detailed structure and developmental processess which took place durin sexual reproduction. Helpful for Board and NEET students.
Fell free for any query or suggestion
Mail us on: biologypratham@gmail.com
Website : www.prathambiology.in
Cycas
Cycas is a gymnosperm that reproduces both vegetatively and sexually. Vegetative reproduction occurs through adventitious buds on the stem base that develop into new plants. Sexual reproduction involves separate male and female plants that produce cones. Pollen from the male cone is transferred to female cones by wind. After fertilization, the ovule develops into a seed protected by a fleshy outer layer and stony middle layer. The seed germinates by rupturing at the micropyle and producing a radicle and plumule to form a new sporophyte plant.
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Reproduction ensures continuity of species generation after generations as the older individuals undergo senescence and die. Flowering plants shows sexual mode of reproduction and bears complex reproductive units as male and female reproductive units along with accessary structures.
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2. Gymnosperms reproduce sexually through cones that contain either microsporangia or megasporangia. Pollination occurs and pollen tubes carry sperm to fertilize eggs within the ovules, forming seeds with embryos.
3. The life cycle involves microspores forming male gametophytes that produce sperm, and megaspores forming reduced female gametophytes containing eggs. Fertilization occurs
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Reproduction ensures continuity of species generation after generations as the older individuals undergo senescence and die. Flowering plants shows sexual mode of reproduction and bears complex reproductive units as male and female reproductive units along with accessary structures.
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end of the DNA is telomerase extending? 3. What does this extension accomplish? 4. Why don't
organisms with circular chromosomes also have telomerase?.
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DNA electrophoresis works by passing an electric current over cells to enable them to take up
extracellular DNA. separating different sizes of negatively-charged DNA fragments in a gel
matrix. having different sizes of DNA fragments separate by having the DNA run toward the
negative electrode..
Diving sea mammals face an unusual situation in regulating their breat.pdf
Diving sea mammals face an unusual situation in regulating their breathing compared to
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depletion, diving mammals can shut off blood flow to large portions of tissues and these tissues
no longer contribute CO2 to the blood. Therefore, what system for regulating breathing rate
should a diving mammal evolve?.
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issues regarding public/private/cooperative financing of sports organizations. Your assignment
will also involve the following elements: Step 1: Overview: Background information about the
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participation..
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Discuss career-related goal setting and decision making.
1. Have you made intentional choices related to where you currently are in your career or did you
end up where you are haphazardly?
2. What is the importance of goal setting to making effective decisions related to your career?
3. How do you think SMART goals can help in making intentional goals?
4. Discuss the SMART goals you made in this lesson.
5. What changes will you make in how you approach your career goals after completing this
lesson?.
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operations processing is done at one central computer.
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compete for funds in the U.S. capital markets? (LOI4-2). 2. In which foreign industry has
privatization been most important? (LOI4-1) 3. How does foreign investment help the U.S.
government? (LOI/4.1) 4. What is a key tax characteristic associated with state and local
(municipal) securitics? (LOI/4-2) 5. What are three forms of corporate securities discussed in the
chapter? (LO/4-2) 6. Do corporations rely more on external or internal funds as sources of
financing? (LO/4-2) 7. Explain the role of financial intermediaries in the flow of funds through
the three-sector economy. (LO/4.3) 8. What are electronic communication networks (ECNs)?
Generally speaking, are they currently part of the operations of the New York Stock Exchange
and the NASDAQ Stock Market? (LOI4-4) 9. Why is secondary trading in the security markets
important? (LOI4-4) 10. How would you define efiicient security markets? (LOL/4.5) 11. The
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How can we differentiate its various forms? (LOI4.5) 12. What was the primary purpose of the
Securities Act of 1933 ? (L.O/4-6) 13. What act of Congress created the Securities and Exchange
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Discussion Question
Summary . Way back many years ago in 1970's, the first American businesses started to expand
and began to contribute to the world's market economy. Nowadays, still many businesses are
developing due to technological advancements. Because of the development of new machines,
tools, equipment, jigs and other types of materials, many corporations flourished worldwide.
Many businessmen started to search for stakeholders, customers, suppliers, employees and other
manpower that are needed to sustain the stability of the supply chain performance. Some of the
common manufacturing companies that can still withstand their business are food and water
industries, supermarkets, retail manufacturing companies, wholesale manufacturing companies,
car manufacturing companies, electronics industries, telecommunication companies, web
developing companies, solar companies, environmental companies, petroleum companies,
furniture industries, real estate companies, construction companies, pharmaceutical companies,
clothing industries, machinery industries and other types of companies in the whole world.
Industrial trading both on importing and exporting of products or goods through air, land or
water-based transportation is widely known in order to give the customers the desired products
or goods they purchased. The goal of every company is to make their customers satisfied with
the products they ordered. In order to monitor their company performance, the business
organization which includes the bottom, middle and top management come together to discuss
possible opportunities and solutions when the company is facing crisis. They ensure that the
company's key performance indicators reach its high level of percentage like OOE and other
performances that can lead to higher productivity, efficiency and effectiveness of the company's
business towards the market.
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The term "Market Basket" is composed of raw materials, resources of foods or different kinds of
product commodities that are fixed together in a location in which many buyers, retailers or
wholesalers plan to visit to observe, explore and buy or sell their products to customers or
consumers or to sellers to gain profit. Market Basket is the common tool used to monitor the
inflation progress which is the increase rate of the prices of products in the market economy. The
sellers can estimate when to increase or decrease prices of products according to the supply and
demand of the products' resources. When supply decreases, price increases. When there is an
increase of demand, price decreases. It is based on the law of supply and demand. The Market
Basket was first introduced in 1950's. The Demoulas named Telemachus "Mike" Demoulas and
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Telemachus had diverted money and assets to the Demo.
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List the types of evaluation
Ask user, modeling, observation, testing
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Can you answer this questions in short answer?i need it very immediately
thank you
.
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