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

Only two kinds of Egg laying mammals are left on the planet today—the duck-billed platypus and the echidna, or spiny anteater. These odd “monotremes” once dominated Australia, until their pouch-bearing cousins, the , marsupials invaded the land down under 71 million to 54 million years ago and swept them away.

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Write short notes on bacteria based on their shapes

Posted by Akhil Ak 3 years, 2 months ago

CBSE > Class 11 > Biology

2 answers

Prince Yadav 3 years, 2 months ago

Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters. Bacteria are found in every habitat on Earth: soil, rock, oceans and even arctic snow. Some live in or on other organisms including plants and animals including humans.

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Terez Gomes 3 years, 2 months ago

Bacteria are a type of biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals.Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters .

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Which body part have the longest bone

Posted by Rishabh Sharma 3 years, 2 months ago

CBSE > Class 11 > Biology

5 answers

Nisha Bharti 3 years, 2 months ago

In leg femur

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Afreen Afreen 3 years, 2 months ago

Femur

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Anjan Karthi 3 years, 2 months ago

The upper leg or the thigh. The bone is thigh bone or FEMUR.

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Anshul Narwal 3 years, 2 months ago

In leg femur

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Mayank Dabas 3 years, 2 months ago

Femur

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Differentiate between mycorrhiza and coralloid roots

Posted by Chellamuthu Muthusamy 3 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Preeti Dabral 3 years, 2 months ago

The key difference between mycorrhiza and coralloid roots is that mycorrhiza is a type of mutualistic association occurring between a higher plant and a fungus while coralloid roots are negatively geotropic roots of cycads which are in a mutualistic association with nitrogen-fixing cyanobacteria.

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Name of fish Which have no bones?

Posted by ??? ??? 3 years, 2 months ago

CBSE > Class 11 > Biology

2 answers

Mayank Dabas 3 years, 2 months ago

Sharks and rays

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Badrinath Walker 3 years, 2 months ago

Jelly fish, sqiud

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What is polysaccharide

Posted by Sushant Khawas 3 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

??? ??? 3 years, 2 months ago

Polysaccharide are the most abundant carbohydrates found in food. They are long chain polymeric carbohydrates of monosaccharide units bound together by glycositic linkages.

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Point out the difference between unicellular and multicellular organisms giving suitable examples

Posted by Judith Judith 3 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

??? ??? 3 years, 2 months ago

Unicellular organism includes bacteria,yeast. Example- A paramecium is slipper shaped. Multicellular organism are composed of more than one cell with groups of cell differentiating to take on specialized functions. Examples- Muscles cells have more mitochondria than most other cells so that they can readily produce energy for movement .

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list down bacteria that are economically important also list down bacterial diseases and its causative bacterium

Posted by , 🙂 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Adithya Dev A 3 years, 3 months ago

1) Economically important = lactobacillus (for producing curd), Rhizobium (nitrogen fixation), methanogens (producing CH4 gas), etc. 2) Bacterial diseases = cholera (Vibrio cholerae), pneumonia (Streptococcus pneumoniae), anthrax (Bacillus anthracis), etc.

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, 🙂 3 years, 3 months ago

Answer plz

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How do I start learning 11

Posted by , 🙂 3 years, 3 months ago

CBSE > Class 11 > Biology

3 answers

??? ??? 3 years, 2 months ago

You study the class 11 on YouTube and NCERT Books and also CBSE guide

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, 🙂 3 years, 3 months ago

Any other YouTube channel

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Aakash Kumar 3 years, 3 months ago

Study by CBSE guids

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The man 3 speed

Posted by Shahma Khan 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Anjan Karthi 3 years, 2 months ago

Classification is the process of putting organisms into convenient categories based on a few basic characteristics.

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K.S.Saranya Saranya 3 years, 3 months ago

What is classification

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Neet ki tayari kaise kare

Posted by Daksh Dhaka Dhaka 3 years, 3 months ago

CBSE > Class 11 > Biology

4 answers

Aakash Kumar 3 years, 3 months ago

Padh kar ?

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Ankita Singh 3 years, 3 months ago

You follow NCERT books not follow other books you first preference NCERT Book

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Divya Kumari 3 years, 3 months ago

Padh kr kare aur kya??

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Bhai Log 3 years, 3 months ago

Kitabo se kr or kese krega???

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How to learn scientific name easily

Posted by Daksh Dhaka Dhaka 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 3 years, 3 months ago

Make a story from the sound bites.
Clearly differentiate similar plants.
Get your friends or family to adopt a botanical name.
Put up plant names around the house.
Make flash cards.
Use Apps.
Look up the meaning of botanical names.

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What is the scientific name of crocodile ?

Posted by Daksh Dhaka Dhaka 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Sia ? 3 years, 3 months ago

Crocodylinae

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Koushani Ghosh 3 years, 3 months ago

Scientific name of crocodile is Crocodylinae

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2) Write a brief essay on what you aspire to be in your future and what prompted you to take Biology as a major. What hurdles do you expect to face in the subject and what is your favourite aspect of the subject? Include your aspirations.

Posted by Vaibhav Pandey 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Vaibhav Pandey 3 years, 3 months ago

Please answer it urgent

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Anybody have previous years NEET question paper???

Posted by Krishna Jaiswal 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Ankita Singh 3 years, 3 months ago

Google h Nikal lo

3Thank You

Daksh Dhaka Dhaka 3 years, 3 months ago

Kyu

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Biology sample paper set 10 solution 2019 2020

Posted by Aahna Singh 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Himanshu Rajput 3 years, 3 months ago

Ahana apka kritika ki sis ho kya

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Daksh Dhaka Dhaka 3 years, 3 months ago

Whole set

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How can u say that pteridophyta is the most evolved species compare to thallophyta and bryophyta??

Posted by Tasmiya Khan 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Krishna Jaiswal 3 years, 3 months ago

Because thallophyta and bryophyta they don't have vascular tissue while teridophyta possess!!!!! ?

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Can someone tell me how to start chemistry because I don't understand anything ? Suggest Any YouTube channel for chemistry

Posted by Soniya Rana 3 years, 3 months ago

CBSE > Class 11 > Biology

2 answers

Sia ? 3 years, 3 months ago

<a href="https://mycbseguide.com/video/">https://mycbseguide.com/video/</a>

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Krishna Jaiswal 3 years, 3 months ago

I don't have idea ?

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Define biodiversity?

Posted by Abhishek Su 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Adithya Dev A 3 years, 3 months ago

The different varieties of flora and fauna found in a particular region, be it endemic, endangered or of any other kind, are all termed collectively as BIODIVERSITY. It ranges from 1.7 to 1.8 million on Earth.

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Define the characteristics of monera

Posted by Ujala Pandey 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 3 years, 3 months ago

The Monerans are unicellular organisms.
They contain 70S ribosomes.
The DNA is naked and is not bound by a nuclear membrane.
It lacks organelles like mitochondria, lysosomes, plastids, Golgi bodies, endoplasmic reticulum, centrosome, etc.
They reproduce asexually by binary fission or budding.
The cell wall is rigid and made up of peptidoglycan.
Flagellum serves as the locomotory organ.
These are environmental decomposers
They show different modes of nutrition such as autotrophic, parasitic, heterotrophic, or saprophytic.

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Distinguish between poikilothermic and homoiotheric organisms

Posted by Lucky Lubana 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 3 years, 3 months ago

Homeothermic is an antonym of poikilotherm. As adjectives the difference between homeothermic and poikilotherm is that homeothermic is (biology|of an|animal) capable of maintaining a relatively constant body temperature independent of the surrounding environment while poikilotherm is cold-blooded.

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What is mean by holocrine, apocrine and merocrine glands

Posted by P.Akshitha Reddy 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 3 years, 3 months ago

Exocrine glands are named apocrine glands, holocrine glands, or merocrine glands based on how their products are secreted.

Merocrine secretion – cells excrete their substances by exocytosis into a duct; for example, pancreatic acinar cells, maximum sweat glands of humans, goblet cells, intestinal glands, tear glands, etc.
Apocrine secretion – a portion of the cell membrane that contains the excretion buds off. Examples are sweat glands of arm pits, pubic region, skin around ****, lips and nipples; mammary glands, etc.
Holocrine secretion – the entire cell disintegrates to excrete its substance; for example, sebaceous glands of the skin and nose, meibomian gland, zeis gland, etc.

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How many hydrogen bonds are present in one coil of dna

Posted by P.Akshitha Reddy 3 years, 3 months ago

CBSE > Class 11 > Biology

1 answers

Priyanshi Sharma 3 years, 3 months ago

one complete turn of the DOUBLE HELIX has 10 base pairs. So, in one coil of dna there are 5 base pairs. A double helix of dna can have 2 to 3 hydrogen bonds. So, in ONE COIL OF DNA, there are around 5 HYDROGEN BONDS.

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Define allosteric modulation

Posted by Hemnath Senthil 3 years, 3 months ago

CBSE > Class 11 > Biology