CBSE > Class 11 > Biology | CBSE Board | Homework Help

The characteristic features of life is Growth, reproduction, metabolism and movement or locomotion. And the defining features of life is Consciousness, and cellular organisation of the body

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Adithya Dev A 4 years, 3 months ago

1) Breathing. 2) Movement and locomotion (in most organisms.) 3) Growth.

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What is capsule made up of

Posted by Vedant Rai 4 years, 3 months ago

CBSE > Class 11 > Biology

3 answers

Samiksha Pawar 4 years, 2 months ago

It is made up of thick and though sheath of glycocalyx

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Saivenkat Vashapaka 4 years, 3 months ago

Mucopolysaccharide's + Amino acid's

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Roopam Almadi 4 years, 3 months ago

Mucopolysaccharides + Ammino acid

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during covid -19 our mission is/was to protect our earth planet and human's by our action . based on values and ethics rather than personal gave keeping the above message in mind prepare a chart to high light the effect of covid -19 and ways to curb it

Posted by Laxmi Narayan 4 years, 3 months ago

CBSE > Class 11 > Biology

0 answers

ANSWER

Define Biomolecules.

Posted by Vikasha Bhati 4 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Tripti Singh 4 years, 3 months ago

A biomolecule or biological molecule is a loosely used term for molecules present in organisms that are essential to one or more typically biological processes, such as cell division, morphogenesis, or development.

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Why does exchange of gases continue to occur in the lungs even if you hold the breath for 30 second

Posted by Simran Nair 4 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Adithya Dev A 4 years, 3 months ago

Due to presence of RESIDUAL volume of air in the lungs. It ensures continuous exchange of respiratory gases in the alveolar sacs even when we forcefully exhale air or hold our breath for a few seconds.

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Define protochordates?

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Eyahiya Ahmed 4 years, 3 months ago

Protochordates are an informal category of animals (i.e.: not a proper taxonomic group), named mainly for convenience to describe invertebrate animals that are closely related to vertebrates. ... These animals have pharyngeal gill slits and a dorsal nerve cord, which is usually solid.

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Tripti Singh 4 years, 3 months ago

Protochordates are an informal category of animals (i.e.: not a proper taxonomic group), named mainly for convenience to describe invertebrate animals that are closely related to vertebrates. This group is composed of the Phylum Hemichordata and the Subphyla Urochordata and Cephalochordata

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Define mutagenesis with example

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Himanshu Rajput 4 years, 3 months ago

Hlo khushi

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Khushi Tiwari 4 years, 3 months ago

A mutagen is defined as any physical or chemical substance that can change the genetic material of an organism there by causing a mutation . furthermore most mutations have the potential cause cancer hence , mutagens are possibly carsionogenic in Nature .

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Psuedocoelomate ?

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Sai Sudeep Kumar Das 4 years, 2 months ago

Before have a idea about coelom! In some protostomes, the embryonic blastocoele persists as a body cavity. These protostomes have a fluid filled main body cavity unlined or partially lined with tissue derived from mesoderm. This fluid-filled space surrounding the internal organs serves several functions like distribution of nutrients and removal of waste or supporting the body as a hydrostatic skeleton. A pseudocoelomate or blastocoelomate is any invertebrate animal with a three-layered body and a pseudocoel. The coelom was apparently lost or reduced as a result of mutations in certain types of genes that affected early development. Thus, pseudocoelomates evolved from coelomates.[14] "Pseudocoelomate" is no longer considered a valid taxonomic group, since it is not monophyletic. However, it is still used as a descriptive term. Important characteristics: lack a vascular blood system diffusion and osmosis circulate nutrients and waste products throughout the body. lack a skeleton hydrostatic pressure gives the body a supportive framework that acts as a skeleton. no segmentation body wall epidermis and muscle often syncytial usually covered by a secreted cuticle most are microscopic parasites of almost every form of life (although some are free living) eutely in some loss of larval stage in some possibly pedomorphism

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Adithya Dev A 4 years, 3 months ago

Invertebrate organisms whose body cavity is not derived from a MESODERM, as in coelomates, and thus, have pseudocoels are called PSEUDOCOELOMATES. Eg :- roundworms.

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Osmoregulation?

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

3 answers

Abdulla Siddiqui 4 years, 3 months ago

Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, Detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, It maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body .

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Adithya Dev A 4 years, 3 months ago

Phenomenon of maintaining a balance between concentration of water and other ions between the body of an organism and its surrounding environment.

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Pankaj Rai 4 years, 3 months ago

Maintaining a constant environment inside the body of an organism

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Why three reasons fail of the two kingdom system ?

Posted by Ganga Enterprises 4 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Vijay Vijayendra 4 years, 3 months ago

Right

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Sia ? 4 years, 3 months ago

Several Objections have been raised against this two Kingdom classification. They are as following:
1) First formed organisms were neither plants nor animals.
2) Fungi differ in the structure, physiology and reproductive details from plants.
3) At the lower level of organisations there are several instances where the distinction of plants and animals actually vanish. For example, Euglena has both holophytic and holozoic nutrition and saprobic nutrition (mixotrophic nutrition or mixed form of feeding). Sponges are branched, fixed and irregular in outline just like plants. It's relatives have both holophytic and holozoic nutrition. Unicellular algae like Chlamydomonas are motile, possess regular shape, definite growth and photosynthetic organelles.
4) Groups of Unicellular algae (euglenoids, diatoms and dinoflagellates) and protozoa show sufficient degree of resemblance.

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What are the benefits of choosing PCB with Computer. plzz Tell me

Posted by Shyam Gangwar 4 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Khushi Tiwari 4 years, 2 months ago

if You decide to take computer subject with PCB so you can choose computer techno field other than medical field .. it's your choice .

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Tripti Singh 4 years, 3 months ago

If you're interested in computer and want to do something related to this and you're sure that good at this then you can get a good marks.

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What is the role of capsule in life history of moss?

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Khushi Pandey 4 years, 3 months ago

In capsule the formation of spores takes place in case of moss and further it form (protonema) first stage and then second stage ( leafy stage) which develop from lateral buds

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What is Ferns? And it's Uses

Posted by Nisha Gurjar 4 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 4 years, 3 months ago

Ferns are not of major economic importance, but some are used for food, medicine, as biofertilizer, as ornamental plants and for remediating contaminated soil. They have been the subject of research for their ability to remove some chemical pollutants from the atmosphere.

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CAN we go to only in medical field after taking PCB SCIENCE. Guys please suggest me some options of PCB except medical field.

Posted by Khushi Tiwari 4 years, 3 months ago

CBSE > Class 11 > Biology

5 answers

Khushi Tiwari 4 years, 3 months ago

Thank u guys for Your great answers and now I have no doubt all things are fully cleared thanx all,,

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Yuki Richa 4 years, 3 months ago

You can be physiotherapist, also can take psychology, and can to masters in any subject like botany, zoology etc. These are all beautiful subject and indeed science too. This is just a superstition in India that if you take science you should go in medical field, engineering but I don't think so , Actually this is because our mind has been conditioned , if you really want to succeed in life break all these orthodox, and harmful barriers. Always follow your dream , Dream Dream! Indeed it isn't the answer what you have asked but my friend being a well wisher and harmonic I should tell you this now, lets come to the point, you had asked other Field except medical so let me enlighten you that there are thousands of fields. You can go for pharmacy, psychology, physiology, forensic sciences, Agricultural science, neuroscience. You can be an animal or plant morphologies too. At last I just want to advise or also implore you that ALWAYS FOLLOW AND PURSUE YOUR DREAMS hope you understand my point.

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Nisha Gurjar 4 years, 3 months ago

Don't worry khushi Do hard work..... Agr aap mbbs nhi krna chahti ho toh BDS, BAMS koi bhi select kr lena... (Best career options)

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Nisha Gurjar 4 years, 3 months ago

1,Biomedical Engineer. 2,Microbiologist. 3,Cardiologist. 4,Nutritionists. 5,Physiotherapist. 6,Cardiac Perfusionist. 7,Drug Safety Associate. 8,Clinical Research Associate.

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Abhishek Kumar Sharma 4 years, 3 months ago

There are so many fields after taking bio . .but not more than taking Maths . I suggest just take Maths there are so many fields by taking Maths also..

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Anyone suggest me best timetable for starting study of class 11th with PCB

Posted by Khushi Tiwari 4 years, 4 months ago

CBSE > Class 11 > Biology

4 answers

Himangshu Das 4 years, 3 months ago

See shobhit nirwan's video about time table

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Khushi Tiwari 4 years, 3 months ago

thank u for the great time table

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Ãñkît Mudgal 4 years, 3 months ago

We had to wake 4:00 AM and study 2 hour. And if we do this everyday then you will change your life. We need smart study, not hard study.

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Abhay Singh 4 years, 4 months ago

I also need it please provide proper shedule for PCB

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How I start class 11th study? my stream is PCB ..let me give answer with some suggestions

Posted by Khushi Tiwari 4 years, 4 months ago

CBSE > Class 11 > Biology

0 answers

ANSWER

List the all enzymes present in human body with its purpose , Function , where they work???

Posted by Mirudhula Mirudhu 4 years, 4 months ago

CBSE > Class 11 > Biology

2 answers

Sia ? 4 years, 3 months ago

Functions of Enzymes in Human Body

Enzyme	Secreted by	Function
Salivary Amylase (Ptyalin)	Salivary Glands	Converts starch to maltose
Renin	Stomach	Converts milk proteins to peptides
Pepsin	Stomach	Converts other proteins to peptides
Gastric Amylase	Stomach	Converts starch to maltose
Gastric Lipase	Stomach	Converts butter fat into fatty acids and glycerol
Trypsin	Pancreas	Converts proteins to peptides
Chymotrypsin	Pancreas	Converts proteins to peptides
Steapsin (Pancreatic Lipase)	Pancrease	Converts fats into fatty acids and glycerol
Carboxypolypeptidase	Pancreas	Converts peptides into amino acid.
Pancreatic Amylase	Pancreas	Converts starch to maltose
Entirokinase	Small Intestine	entirokinase activates trypsinogen to tryspsin.
Eripsin	Small Intestine	Converts polypeptides to amino acids.
Maltase	Small Intestine	Digests Maltose to glucose.
Sucrase	Small Intestine	Digests sucrose into glucose and fructose.
Lactase	Small Intestine	Digests lactose into glucose and galactose.

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Khushi Tiwari 4 years, 4 months ago

What is peptides?

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How do living thing grow?explain term growth in living beings

Posted by Yashika Chauhan? 4 years, 4 months ago

CBSE > Class 11 > Biology

2 answers

Sia ? 4 years, 4 months ago

Growing is capable to a certain living organism. Growth means getting larger in size, and for multi-cellular organisms this is done by making more cells. Plants have special tissues called meristems where growth occurs. Single celled organisms increase their numbers by dividing and making more cells like themselves.

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Akhya Sahay 4 years, 3 months ago

Growth occurs internally in living beings

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Should I join an online batch or wait for an offline one to start as I want to prepare for neet2023

Posted by Helper . 4 years, 4 months ago

CBSE > Class 11 > Biology

1 answers

Akhya Sahay 4 years, 4 months ago

Go for online...time waits for noone

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ANSWER

How many days ovum wait for sperm in oviduct for fertilisation

Posted by Nidhi ? Bhola ? 4 years, 4 months ago

CBSE > Class 11 > Biology

5 answers

R.Jeyaprakash R.Jeyaprakash 4 years, 3 months ago

3 days

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Khushi Pandey 4 years, 3 months ago

24 hours means 1 day

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Nidhi Kashyap?? 4 years, 3 months ago

24 hours

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Pankaj Rai 4 years, 4 months ago

Yes about a day

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Nidhi ? Bhola ? 4 years, 4 months ago

I think 24hours

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I've successfully wasted 8 days.. Please tell me how I can start studying for 11th

Posted by Helper . 4 years, 4 months ago

CBSE > Class 11 > Biology

5 answers

Mary Stuart 4 years, 3 months ago

No this is not absolutely true...to?? this replier Like first take classes don't make a time table...ok Then make sure after one week in which subjcet u are weak....u need more time in that particular subject.....then make a timetable.... don't make a hectic schedule ok.... remember NCERT IS 'LORD OF BOOKS' .... Like physics is strong but chemistry mein lage hue hai toh 3 ghante physics phir break phir biology.....ha dyhaan rakhna biology m kam time dena chahiye sirf kuch chapters ko chodke...ok phir chemistry 3½ hours...and lastly ATLEAST PEE DAY 7-8 HOURS PADHNA HAI.....HA TOHDA MUSHKIL HAI PAR NAMOOMKIN NHI... Hope this will help u?? HAPPY LEARNING!!!

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Harshu ? 4 years, 4 months ago

First u make timetable then start study subjects according to your streams

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Pratik Sahoo 4 years, 4 months ago

First you select your streams. Then study subjects according to your streams.

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Hey Kriti 4 years, 4 months ago

Class 11th subjects are related to class 9th subjects ? ? ?

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, 🙂 4 years, 4 months ago

The classes are not even started

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How to start 11th studies

Posted by Helper . 4 years, 4 months ago

CBSE > Class 11 > Biology

2 answers

Khushi Tiwari 4 years, 4 months ago

Make timetable and then you start study according to your time table

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Nidhi ? Bhola ? 4 years, 4 months ago

See vedio of all chapters then jb aapki teacher pdaege toh aapko thoda easy hoga

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What is std 11?....?i literally didn't study any single word

Posted by Kruti Dave 4 years, 4 months ago

CBSE > Class 11 > Biology

5 answers

Adithya Dev A 4 years, 3 months ago

A little more detailed form of 9th standard. Revise what you learned in std. 9. You will get the basics of 11th.

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Pratik Sahoo 4 years, 4 months ago

What you learn in class 10th. These are in class 11th but this subject are in advanced version.

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Helper . 4 years, 4 months ago

Me too.. I've just revised my basics of 9th and 10th

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Akhya Sahay 4 years, 4 months ago

Same here

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Ishan G 4 years, 4 months ago

Mee too

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What is the called harvesting system in LHC?

Posted by Sayantika Mondal 4 years, 4 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 4 years, 4 months ago

The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem.

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Systema meaning

Posted by V B 4 years, 4 months ago

CBSE > Class 11 > Biology

3 answers

Sia ? 4 years, 4 months ago

Systema has been presented in some Western media as a Russian martial art, although it is not clear it exists as a single martial art.

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Ani G 4 years, 3 months ago

Systema means sequence or order

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Hariom Dalal 4 years, 4 months ago

Systema is a Latin word which means systematic arrangements of organisms. Systematic is derived from systema

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Importance of feathers in birds

Posted by Naveen Rajasekar 4 years, 4 months ago

CBSE > Class 11 > Biology

1 answers

Apeksha Dodyal 4 years, 4 months ago

Feathers enables the birds to prevent heat loss in extreme cold conditions preen glands on bird's skin helps in feather dressing due to this gland there body do not wets even when they are in contact with water .

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What is bisexual

Posted by Akash U K 4 years, 4 months ago

CBSE > Class 11 > Biology

1 answers

Hiya Modi 4 years, 4 months ago

Those plant who have both Male and female in one plant

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What is marpology

Posted by Akash U K 4 years, 4 months ago

CBSE > Class 11 > Biology

2 answers

Sia ? 4 years, 4 months ago

In linguistics, morphology is the study of words, how they are formed, and their relationship to other words in the same language. It analyzes the structure of words and parts of words such as stems, root words, prefixes, and suffixes.

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Khushi Pandey 4 years, 3 months ago

Morohology simply means appearence ( external appearence).

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