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What is bowel movement?

Posted by Anushka Garg 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Narayan Vishwakarma 6 years, 11 months ago

A bowel movement is the last stop in the movement of food through your digestive tract

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What is yolk

Posted by Shruti Gupta 6 years, 11 months ago

CBSE > Class 11 > Biology

2 answers

Narayan Vishwakarma 6 years, 11 months ago

Among animals which produce one, the yolk is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo

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Ritu Thapliyal 6 years, 11 months ago

The yellow internal part of egg

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Important points in transport of gases from.chapter breathing

Posted by Littleshine Aaaru?? 6 years, 11 months ago

CBSE > Class 11 > Biology

0 answers

ANSWER

What is cork cambium?

Posted by Bharat Prajapati 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

Cork cambium is a tissue found in many vascular plants as a part of the epidermis. It is one of the many layers of bark, between the cork and primary phloem. The cork cambium is a lateral meristem and is responsible for secondary growth that replaces the epidermis in roots and stems. The first cork cambium is formed by the dedifferentiation of the outer part of the cortex. As the stem increases in girth, the epidermis and the cortex are replaced by another meristematic tissue called the cork cambium. ... Cells on the inner region form the secondary cortex or phelloderm.

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Ring str of glucofuranose

Posted by Neha Chauhan 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

A furanose is a collective term for carbohydrates that have a chemical structure that includes a five-membered ring system consisting of four carbon atoms and one oxygen atom. The name derives from its similarity to the oxygen heterocycle furan, but the furanose ring does not have double bonds.

Cyclic sugars that contain a five membered ring are called "furanoses". The term is derived from the similarity with the aromatic compound furan and tetrahydrofuran. Cyclic sugars that contain a six membered ring are called "pyranoses" The term is derived from the similarity with the compound pyran and tetrahydropyran.

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What is taxa?

Posted by Adarsh Patel 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Ankit Dey 6 years, 11 months ago

Every taxanomical character is individually known as TAXA .

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What means of cell

Posted by Debabrata Mohapatra 6 years, 11 months ago

CBSE > Class 11 > Biology

3 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 6 years, 11 months ago

cell is the structural and functional unit of life.

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Yogita Ingle 6 years, 11 months ago

Cells are the basic unit bounded by the membrane that consists of the fundamental molecules of life of which all living organisms are made up of. Cell Biology encompasses everything about cells from its basic structure to the functions of every cell organelle. A single cell is an organism in itself such as yeast or bacterium; other cells gain special functions soon after they mature. These acquire unique functions as they mature.

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Aiman Kulsoom 6 years, 11 months ago

Cell is the fundamental structural and functional unit of all living organisms

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What will happen if you inject air in your veins with a syringe?

Posted by Kartik ? 6 years, 11 months ago

CBSE > Class 11 > Biology

2 answers

Kartik ? 6 years, 11 months ago

The death part is what I've been wondering about. So this is the reason why doctors spray some fluid in the open before injecting inside the patient..... or am I wrong?

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Yogita Ingle 6 years, 11 months ago

Tiny air bubbles go into IV fluids all the time without consequence. Some air can get injected during CT scans or medication pushes (see CT images in another answer). These small amounts float along until they find a good place to rest or reach the lung. The gasses are absorbed into the blood and they disappear.

If a larger amount of air is injected at once, you get air instead of blood flowing through the veins. When this reaches the right heart, you get a beating right ventricle sloshing around bubbles instead of blood, and cardiac output goes to zero just as if the heart had stopped. The patient dies suddenly.

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Difference between inspiratory reserve volume and expiratory reserve volume

Posted by Gursahb Preet 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Yogita Ingle 6 years, 11 months ago

Inspiratory reserve volume (IRV)	Expiratory reserve volume (ERV)
1. It is the maximum volume of air that can be inhaled after a normal inspiration.	1. It is the maximum volume of air that can be exhaled after a normal expiration.
2. It is about 2500 – 3500 mL in the human lungs.	2. It is about 1000 – 1500 mL in the human lungs.

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Why solute potential have negative value?

Posted by Yakshi ? 6 years, 11 months ago

CBSE > Class 11 > Biology

4 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

naaa,,, The more the amount of solute, the more negative is the value solute potential. So the solute potential of a solution is always negative due to the increase in the solute concentration in a solution.

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Yakshi ? 6 years, 11 months ago

I think more no. Of solute molecules increases the solute potential....???

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Yakshi ? 6 years, 11 months ago

Ohh thanks now i got it......?

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∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

Solute potential is always negative as more the solute molecules in the solution lesser the solute potential.

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10 glycerin are joined together and form protein then find atomic weight of that protein

Posted by Moon Khan 6 years, 11 months ago

CBSE > Class 11 > Biology

2 answers

Moon Khan 6 years, 11 months ago

Ye biomolecules ka h

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Yakshi ? 6 years, 11 months ago

Yeh kaun sa chapter hai????????

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Notes of human respiratory system

Posted by Littleshine Aaaru?? 6 years, 11 months ago

CBSE > Class 11 > Biology

3 answers

Aarav Tyagi 6 years, 11 months ago

3. Larynx: It is a chamber situated in the region of neck. It is supported by four cartilages : thyroid is the largest and in the form of a broad ring incomplete dorsally, cricoid is a complete ring lying at the base of thyroid, a pair of arytenoids lying above the thyroid but in front of cricoid, and epiglottis situated behind the tongue that serves to cover the entrance to the trachea so that food particles may not enter into it. Larynx is also known as voice box since it helps in the production of sound. 4. Trachea: It is a tube starting from larynx running through the neck and the thoracic cavity. The trachea runs through the neck in front of the oesophagus. The trachea or windpipe is about 12 cm long and divided into two bronchi in the thoracic region. 5. Bronchi and bronchioles: The two bronchi enter into right and left lungs of either side. Inside the lungs they further branch into many smaller bronchioles with a diameter of about 1 mm. These bronchioles further divide into terminal and then into respiratory bronchioles. Each respiratory bronchiole divides into a number of alveolar ducts that further divide into atria, which swell up into air sacs or alveoli. 6. Lungs: A pair of conical shaped lungs is situated in the double walled sacs called pleural cavities. They are spongy and richly supplied with blood vessels and capillaries. They have about 300-400 millions of alveoli through which exchange of gases occur. Lungs have various bronchioles ending into alveoli where exchange of gases occurs. The alveoli are thin walled pouches the walls of which have epithelial linings supported by basement membrane. I hope my answers help U ☺☺☺☺

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Aarav Tyagi 6 years, 11 months ago

All mammals have lungs for the purpose of respiration. This is known as pulmonary respiration. The mammalian respiratory system consists of the nasal cavity, nasopharynx, larynx, trachea, bronchi, bronchioles and lungs. 1. Nasal cavity: It is a large cavity lying dorsal to the mouth and is lined by mucous secreting epithelium. The nasal cavity opens outside through a pair of external nostrils or nares. Bones and cartilages support the nasal cavity. The nasal cavity is divided into two parts by a nasal septum. The cavity opens inside into pharynx through two internal nostrils. Air while passing through the nasal cavity is filtered, and only the clean air free from dust particles and foreign substances enters the pharynx. The air also gets warmed and moistened in this chamber. It is important to note that air can also be inhaled through mouth directly, but this is not advisable because the air will not be filtered, warmed and moistened. This gradually will harm the respiratory system. 2. Nasopharynx: It is a chamber situated behind the nasal cavity. At the level of soft palate, it becomes continuous with the mouth cavity or oral pharynx. It also receives the openings of eustachian tubes on its lateral sides and is thus connected to the middle ear.

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Yakshi ? 6 years, 11 months ago

U can take help of neela bakore tutorials.......i m sure u will like it.....

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Why are colourful polystyrene and plastic packaging used for protecting the food,consider an environmental menace?

Posted by Sagar Bohra 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Smriti Shikha 6 years, 11 months ago

As plastic is non-biodegradable and its process is very costly and includes manual participation thus exposing workers to toxic substances produced during recycling processes. Therefore colourful polystyrene and plastic packaging used for protecting the food consider an environmental menace.

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☆ Define Glomerular Filtration Rate (GFR) ?

Posted by Aarav Tyagi 6 years, 11 months ago

CBSE > Class 11 > Biology

4 answers

Kaavya Singh 6 years, 11 months ago

Glomerular filtration rate (GFR) is a test used to check how well the kidneys are working. Specifically, it estimates how much blood passes through the glomeruli each minute. Glomeruli are the tiny filters in the kidneys that filter waste from the blood.

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Aarav Tyagi 6 years, 11 months ago

thanks frnds☺☺

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Yogita Ingle 6 years, 11 months ago

The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR). The value of GFR in a healthy individual is approximately 125 ml/minute i.e., 180 litres per day

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∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

The amount of filtrate formed by kidney per minute is called Glomerular Filtration Rate (GFR)

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Is the CBSE biology test paper class 11 useful for class 11 final exams?

Posted by Harmanjot Kaur Khaira 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Harmanjot Kaur Khaira 6 years, 11 months ago

Yes

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ANSWER

Differentiate between heart wood and sapwood?

Posted by Sajjita Mishra 6 years, 11 months ago

CBSE > Class 11 > Biology

2 answers

Kaavya Singh 6 years, 11 months ago

Difference # Sapwood or Alburnum: 1. It is outer wood of an old stem. 2. It is light coloured. 3. Living cells are present. 4. Sapwood is the functional part of the secondary xylem or wood. 5. The tracheary elements are not plugged by tyloses. 6. Tracheary elements do not possess any deposition in their lumen. 7. Sapwood or alburnum is lighter. 8. It is less durable because it is susceptible to attack by pathogens and insects. Difference # Heartwood: 1. It is the central wood of an old stem. 2. Heartwood is dark coloured. 3. Living cells are absent. 4. Heartwood is the non-functional part of secondary xylem. 5. The tracheary elements are plugged by tyloses. 6. Tracheary elements have deposition of tannins, resins, gums, etc. 7. Heartwood is heavier. 8. It is more durable due to its little susceptibility to the attack of pathogens and insects.

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Yogita Ingle 6 years, 11 months ago

Sap wood	Heart wood
1. The outer region of the old trees forms the sap wood	1. The central region of the old trees forms the Heart wood
2. It is also called as alburnum	2. It is also called as duramen
3. it is soft and not durable	3. it is hard and durable
4. It is light coloured and formed of living cells	4. It is dark coloured due to the deposition of various substances
5. Vessels are not blocked by tyloses	5. Vessels are blocked by tyloses with various deposits
6. The function of this region is conduction of water and nutrients and also storage of food	6. The function of this region is mechanical support

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Plz.......make me sure that osmotic pressure is the external pressure applied to stop osmosis???

Posted by Yakshi ? 6 years, 11 months ago

CBSE > Class 11 > Biology

4 answers

Joohi Parween 6 years, 11 months ago

Ro is reverse osmosis that is,when pressure applied is more than osmosis pressure,.

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Joohi Parween 6 years, 11 months ago

Yes you are correct don't confuse ?

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Yakshi ? 6 years, 11 months ago

Plz tell me???

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Yakshi ? 6 years, 11 months ago

Here external pressure applied is of two types .......first by piston and second on cell.....i don't know how these are related to each other i mean when we apply pressure on water to stop osmosis then how cell get affected

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What is the mean of common genital pore

Posted by Shruti Gupta 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Smriti Shikha 6 years, 11 months ago

Common external openings of the male and female reproductive systems are called the genital pores.

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ANSWER

Explain guttation

Posted by Ksgayathri Saravanan 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

The loss of water in the form of liquid droplets from the leaf margins and tip in herbaceous plants is known as guttation.

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What are the main steps in Krebs cycle?

Posted by Anu Goswami 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Kaavya Singh 6 years, 11 months ago

The TCA cycle takes place over eight different steps: Step 1: First the acetyl CoA (a two carbon molecule) joins with oxaloacetate (4 carbon molecule) to form citrate (6 carbon molecule). Step 2: The citrate is then converted to isocitrate (isomer of citrate) Step 3: Isocitrate is then oxidised to alpha-ketoglutarate (a five carbon molecule) which results in the release of carbon dioxide. One NADH molecule is also formed in this step. The enzyme responsible for catalysing this step is isocitrate dehydrogenase. This is a rate limiting step as isocitrate dehydrogenase is an allosterically controlled enzyme. Step 4: Here alpha-ketoglutarate is oxidised to form a 4 carbon molecule which picks up coenzyme A forming succinyl CoA. This conversion also forms a NADH molecule. Step 5: Succinyl CoA is then converted to succinate (4 carbon molecule) and one GTP molecule is produced. Step 6: Succinate is converted into fumarate (4 carbon molecule) and a molecule of FADH₂ is produced. Step 7: Fumarate is converted to malate (another 4 carbon molecule). Step 8: Malate is then converted into oxaloacetate and NADH is also produced here.

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How are the minerals absorbed by the plant?

Posted by Varsha Singh 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Yogita Ingle 6 years, 11 months ago

Mineral absorption by plants :
(a) It occurs by apoplast and symplast pathways.
(b) It may be by diffusion, facilitated diffusion, osmosis active and passive uptake
(c) The minerals enter roots in bulk along stream of water under the influence of transpiration pull.
(d) Active salt absorption needs energy.

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which function of liver is responsible for its link with kidney in excretion?

Posted by ∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 6 years, 11 months ago

thanks for your answer but I want answer in few lines. ??

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Why thistle funnel is named so????

Posted by Yakshi ? 6 years, 11 months ago

CBSE > Class 11 > Biology

2 answers

Yakshi ? 6 years, 11 months ago

Thank u so.....much......

1Thank You

Nav Ghuman 6 years, 11 months ago

Because it is a funnel having the shape of thistle flower n a long glass stem. this funnel is used to add reagents to reaction vessels. generally made of glass

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How can we define ATP in simple way???

Posted by Tripti Shah 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Gaurav Seth 6 years, 11 months ago

It may help you :

Adenosine Triphosphate (ATP) is an energy carrying molecule found in all living cells. An ATP molecule comprises of different components like adenine, ribose and three phosphates linked in a chain. The phosphates are linked by high energy phosphate bonds. Hence, ATP on dephosphorylation by ATPases yields energy. Energy is released due to breaking up of high energy phosphate bonds. Energy released by ATP is used to carry out different metabolic reactions of the body.

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Flowers are not of ornamental value for plants, they serve a larger purpose. Discuss

Posted by Hello Hi 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

Ornamental plants are grown for decorative purposes in gardens and landscape design projects, as house plants, for cut flowers and specimen display. Besides, ornamental plants play important role in human health and psychology. Human health depends on well-functioning ecosystems.

List of Ornamental Plants

Roses. Blooming rose bush. Roses have many different cultivars. ...
Ornamental Bulb Plants. Daffodils. ...
Trees. Weeping willow in the morning sun. ...
Conifers. Juniper berries on the branch. ...
Ornamental Shrubs. Lilac bush. ...
Ornamental Grasses. Variety of ornamental grasses. ...
Herbs. Lavendar. Ornamental Plants are also referred to as garden plants has beauty as its main trait. They are usually grown in the flower garden for the display of their flowers.It is a plant primarily grown for its beauty either for screening,accent, specimen, color or aesthetic reasons.

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What is phyllotaxy?

Posted by Vikesh Maan 6 years, 11 months ago

CBSE > Class 11 > Biology

1 answers

Gaurav Seth 6 years, 11 months ago

Phyllotaxy is the arrangement or distribution of leaves on the stem or its branches in such a way that they receive maximum sunlight to perform photosynthesis. Phyllotaxy is of three types :
1.Alternate or Spiral: In this type, a single leaf arise at each node in an alternate manner, e.g. Hibiscus rosa sinensis.
2.Opposite : Two leaves are borne from the node in opposite directions. It is of two types : (i) Opposite Superposed: e.g., Quisqualis. (ii) Opposite Decussate: e.g., Calotropis.
3.Whorled or Verticullate: More than two leaves are borne on a node, which form a whirl.

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Define the double fertilisation and triple fussion.

Posted by Vikesh Maan 6 years, 11 months ago

CBSE > Class 11 > Biology