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Find the odd man out respect to chemoautotrophs

The unique geochemistry of marine shallow-water hydrothermal systems promotes the establishment of diverse microbial communities with a range of metabolic pathways. In contrast to deep-sea vents, shallow-water vents not only support chemosynthesis, but also phototrophic primary production due to the availability of light. However, comprehensive studies targeting the predominant biogeochemical processes are rare, and consequently a holistic understanding of the functioning of these ecosystems is currently lacking. To this end, we combined stable isotope probing of lipid biomarkers with an analysis of the bacterial communities to investigate if chemoautotrophy, in parallel to photoautotrophy, plays an important role in autotrophic carbon fixation and to identify the key players.

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Question 1: What are the basic requirements of photosynthesis? Answer: The basic requirements of photosynthesis are:. Question 2: i Where are the chlorophyll pigments present in a cell. Answer: i In the cell organelle called plastids or chloroplasts. Question 3: Give some adaptations in a green leaf for photosynthesis. Answer: i A large surface area to absorb water. Question 4: What is the importance of photosynthesis in the life of the following : i Green plants ii Non-green plants iii Animals Answer: i Green plants are able to build up complex energy rich molecules of carbohydrates which are further used for different metabolic activities of cells.

Question 5: A leaf is a food factory. Answer: The leaves of green plants are specially developed for the purpose of synthesizing food. The leaf anatomy is best suited for collecting the raw materials. The leaf absorbs CO 2 from the atmosphere through its stomatal openings.

It gets water from the stem. The chloroplasts are the actual sites of photosynthetic reactions-light and dark reactions which result in the formation of glucose. Hence, the ability to collect raw materials and to carry on chemical reactions to synthesize food, it is called as the food factory of the plant. Question 6: Why green leaves are thin and broad?

Answer: Green leaves are thin and broad so that they can receive more light and can photosynthesize more efficiently. Question 7: State one important function of chloroplasts. Answer: Chloroplast contains chlorophyll which is used to trap the solar energy from the sunlight which falls on the leaf.

This energy is used during photolysis to split the water molecule into hydrogen and oxygen. Question 8: Which tissues and cells are mainly concerned with photosynthesis?

Answer: The tissues and cells which contain chloroplasts are mainly the palisade parenchyma and spongy mesophyll cells of a green leaf. Question 9: Why is photosynthesis important in nature? Answer: The body of all living organisms both plants and animals is dependent on the food that has been synthesized in a green cell by photosynthesis. The purification of the atmosphere whereby the volume of CO 2 remains fairly constant due to the photosynthetic activity of green plants.

Oxygen is given out by green plants. Question How do non-green plants such as fungi and bacteria obtain their nourishment? Answer: Non-green plants such as fungi and bacteria obtain their nourishment from decaying organic matter in their environment, which comes from dead animals and plants. Thus they are dependent on photosynthesis. Answer: Oxygen liberated during photosynthesis is a waste for the plant, so, it is released into air and is used by living organisms in respiration.

Question What is meant by photolysis of water? Answer: The splitting of water molecule into two component ions by light is known as photolysis of water. Question Oxygen given out during photosynthesis comes from water. Explain this statement. These OH — react to liberate oxygen. Thus we can say that oxygen liberated during photosynthesis comes from water. Question How is the rate of photosynthesis affected when a green plant gets green light?

Answer: The rate of photosynthesis decreases and finally stops when the green plant gets green light because green light is not absorbed but reflected back by the plant. Question Why is it not possible to demonstrate respiration in a green plant kept in the sunlight?

Answer: When a plant is kept in sunlight, CO 2 released by respiration gets used by photosynthesis to synthesize food. So no carbon dioxide is liberated, and respiration cannot be demonstrated. Question Explain why transpiration and photosynthesis are interlinked during the day. Answer: During the day, the chloroplast in the guard cells are able to carry on photosynthesis, so the osmotic pressure in the cell sap of the guard cells is high and water enters the guard cells which lead to an opening of the stomatal aperture.

Thus stomatal transpiration can take and CO 2 can also enter the green leaf to enable photosynthesis to take place. So, during day time photosynthesis and stomatal transpiration occurs simultaneously.

Question Explain, why respiration is said to be a reversed process of photosynthesis? Answer: In respiration, energy is released as a result of oxidation of food, whereas in photosynthesis it is stored up in a carbohydrate molecule.

Oxygen is used in respiration whereas it is given out as a by-product in photosynthesis. Question Name the molecules which are called assimilatory power? Why are they called so? They are called so, because they provide the energy requirement for CO 2 assimilation during dark reaction of photosynthesis. Question What is the law of limiting factor? Answer: Blackman established the law of limiting factor in connection with photo-synthesis.

According to this law when a process is conditioned to its rapidity by a number of separate factors, the rate of process is limited by the pace of the lowest factor, i. Question Complete the following food chains by writing the names of appropriate organisms in the blanks: Answer: i Grasshopper, Hawk ii Grass, Insects, iii Rabbit, iv Com, Snake.

Question On a bright sunny day water weeds growing in an aquarium were actively giving off bubbles of. Use this information to answer questions that follow : i Name the process occurring in the water weed that has resulted in evolution of these bubbles.

Answer: i Photosynthesis. Question What is meant by destarched plant? How can it be destarched? Answer: A destarched plant has no starch present in the leaves and a leaf remains yellowish-brown when tested with iodine during a starch test. A plant can be destarched by keeping it in the dark for two or three days, so that the leaves are free from stored starch.

Question Using the destarched plant describe step by step how would you proceed to prove that in the absence of light the leaf cannot manufacture starch? Answer: i In a dark room a leaf on the destarched plant is covered on either side with strips of black paper which is kept in place by paper clips or cellophane tape.

Question A healthy croton plant bearing variegated leaves was kept in a dark cupboard to destarch it after which it was placed in sunlight for a few hours. One of the leaves was then plucked and an outline of the leaf marking the green and the non-green regions was drawn.

The leaf was then tested for starch. Using the above information, answer the following questions : i State the aim of the above experiment. Answer: i Chlorophyll is necessary for photosynthesis.

Question A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning she covered one of the leaves with black paper in the centre only. She placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch. If so, state the same. Answer: i The student is investigating the necessity of sunlight for photosynthesis.

Question A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre.

The potted plant was then placed in sunlight for a few hours. Answer: i That light is necessary for photosynthesis.

Question Write an experiment to demonstrate that CO 2 is necessary for photosynthesis. Answer: Take a destarched plant. Insert one of its leaves in a conical flask, which contains potassium hydroxide.

Leave it in the sunlight. After a few hours, test this and any other leaf of this plant for starch. The leaf which was exposed to the atmospheric air becomes blue black, and the one in the flask containing KOH does not become blue black after iodine test. The experiment showing that CO 2 is necessary for photosynthesis. Question List the events taking place in the photo-chemical phase of Photosynthesis. Answer: Photochemical phase of photosynthesis is light dependent.

A series of chemical reactions occur in quick succession initiated by light, therefore the phase is called photochemical phase. It takes place in chlorophyll containing thylakoids of chloroplast. It occurs in following steps :. Question If you are planning an experiment to show the effect of light on photosynthesis : 1 Will you select white light or green light? Justify your answer. Answer: 1 I will select white light because photosynthesis is maximum in white light while it is minimum in green light as green light is reflected by green plants.

Question 1: All life on earth Would come to an end if there were no green plants. Answer: Green plants manufacture food during the process of photosynthesis and give out oxygen a life supporting gas for all organisms.

Question 2: Photosynthesis is considered as a process supporting all life on earth. Answer: This process produces food and releases oxygen, both of which are necessary to maintain life on earth.

Question 3: Chlorophyll is necessary for photosynthesis. Answer: The chlorophyll traps solar energy and converts it into chemical energy.

Aptitude - Odd Man Out and Series

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A bit of 4-billion-year-old rock blasted off the Martian surface about 15 million years ago and eventually landed in Antarctica , where explorers found it in In the decades since, organic compounds found in that meteorite have been sources of controversy: Did they come from Mars, or did the meteorites get contaminated on Earth? Now, a team of Japanese researchers has reexamined the meteorites, and say they found traces of ancient oceans, rich in useful carbon and nitrogen — key ingredients for life.

Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. Free to read. Insight into the transcription-regulatory network that coordinates these processes is fundamental to understanding the biology of this versatile bacterium.

Scientists discover evidence of ancient, nitrogen-rich Martian groundwater hiding in Antarctica

Question 1: What are the basic requirements of photosynthesis? Answer: The basic requirements of photosynthesis are:. Question 2: i Where are the chlorophyll pigments present in a cell. Answer: i In the cell organelle called plastids or chloroplasts. Question 3: Give some adaptations in a green leaf for photosynthesis. Answer: i A large surface area to absorb water. Question 4: What is the importance of photosynthesis in the life of the following : i Green plants ii Non-green plants iii Animals Answer: i Green plants are able to build up complex energy rich molecules of carbohydrates which are further used for different metabolic activities of cells. Question 5: A leaf is a food factory. Answer: The leaves of green plants are specially developed for the purpose of synthesizing food.

Odd Man Out

Origin of earth dates back to 1 10,—15, million years ago 2 — million years ago 3 — million years ago 4 — million years ago Sol. Who finally refuted the theory of spontaneous generation and experimentally disproved it? Answer 3 Louis Pasteur disproved it by Swan neck experiment. An experiment to prove that organic compounds were the basis of life, was performed by 1 Van Helmont 2 Oparin 3 S. Miller 4 Fox Sol.

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To save this word, you'll need to log in. Log In Definition of odd man out : a person who differs from the other members of a group Examples of odd man out in a Sentence Recent Examples on the Web Michigan State seems destined for New York, and several projections have Eastern Michigan as the odd man out for bowl season there are 79 bowl-eligible teams for 78 slots. Lille in Champions League," 2 Oct. He Wants to Go.

odd man out

Green [3] and stars James Mason and Robert Newton. It followed upon wartime action by the IRA in Belfast, in consequence of which Northern Ireland undertook its first and only execution of an Irish Republican , year old Tom Williams. The film's opening intertitle reads: "This story is told against a background of political unrest in a city of Northern Ireland.

In every competitive exam, Odd Man Out type questions are very common. In odd man out problems all the items given in the question except one follow a certain pattern or a group. That means out of the all given elements, one will not fall into the group due to some difference in the property. That is the odd element. Hence, it is the odd one.

ICSE Solutions for Class 10 Biology – Photosynthesis

Skip to main content Skip to table of contents. Advertisement Hide. Bacteria, Bacteriophages, and Fungi Volume 1. Front Matter Pages i-xvi. The Classification and Evolution of Prokaryotes and Eukaryotes. Pages

Apr 21, - The study was carried out at a marine shallow-water hydrothermal system photo- and chemoautotrophic communities, with chemoautotrophy accounting for but chemosynthesis was found to be active down to 8 cm sediment depth. represents one of only two active arc systems in the Atlantic treangelimalta.com GV Gomez-Saez - ‎ - ‎Cited by 10 - ‎Related articles.

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Comments: 1
  1. Arashishakar

    It is a pity, that now I can not express - it is very occupied. But I will return - I will necessarily write that I think.

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