CBSE > Class 12 > Biology | CBSE Board | Homework Help

Pollen grains have the chemical substance called sporopollenin in exine which is resistant to acid-base and no enzyme has yet been discovered to penetrate sporopollenin.that's the reason for it being fossilised

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What is meant by viability

Posted by Isha Ahuja 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

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Is megaspore mother cell develop from sporogenous tissue

Posted by Pawan Kumar 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Manisha Maani 7 years, 8 months ago

Yes it develop from sporogenous tissue

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Is the online test ques sufficient for practicing neet xam

Posted by Bhavika Rai 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Roshani Shaikh 7 years, 8 months ago

It will be better if u will solve NCERT example and exercise also

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Inspiration is a Anobolic or catabolic

Posted by Anjit Singh 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Inderpreet Kaur 7 years, 8 months ago

Respiration is a catabolic process as sugars and fats are broken for energy

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Does the women excrete sperm..what is he liquid they excrete

Posted by Toko Kayne 7 years, 8 months ago

CBSE > Class 12 > Biology

3 answers

Yuraj Obreo 7 years, 8 months ago

Women doesn't excrete sperm

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Yuraj Obreo 7 years, 8 months ago

The liquid is iftrirestic chrom

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Yuraj Obreo 7 years, 8 months ago

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Algae is bacteria or other than bacteria

Posted by Sarveni Yadav 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Pawan Kumar 7 years, 8 months ago

Algae belongs to kingdom plantae . They are thallophytes as their body is thallous .primitive plants.

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Why some people get bold?

Posted by Sunyaara Putt 7 years, 8 months ago

CBSE > Class 12 > Biology

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What are runner suckers and stolons

Posted by Anshima Sharda 7 years, 8 months ago

CBSE > Class 12 > Biology

4 answers

Sai Sai 7 years, 8 months ago

??????????????????????????????????????????????????????????????

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Jaya Shanti 7 years, 8 months ago

a creeping horizontal plant stem or runner that takes root at points along its length to form new plants.

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Jaya Shanti 7 years, 8 months ago

it spread rapidly after being left undisturbed to sucker"

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Jaya Shanti 7 years, 8 months ago

A runner, sucker or any basal branch which produces roots is called a stolon

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How do they live under such crushing pressure and do they have any special enzymes?

Posted by Krati Jain 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Akshay Verma 7 years, 8 months ago

Complete your question first..

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What is the phenotype of Tt

Posted by Isha Ahuja 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Hardeep Kaur 7 years, 8 months ago

Phenotype of Tt Will be tall plant

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Self incompatabilty prevent both autogamy and geitnogamy or only autogamy

Posted by Isha Ahuja 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Akshay Verma 7 years, 8 months ago

It prevents both auto as well as geitnogamy.

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Who is the father of new gentics??????

Posted by Jaswanth Sai 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Isha Ahuja 7 years, 8 months ago

Gregor john mendel

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Shivani Singh 7 years, 8 months ago

gregor mendel

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Metameric segmentation is true segmentation or false segmentation

Posted by Harsh Garg 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Jaya Shanti 7 years, 8 months ago

True segmentation.

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Why internal fertilisation is advantageous than external fertilisation ?

Posted by Sohini Chakraborty 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Najirul Husaain 7 years, 8 months ago

Because of proper embryonic care and protection , the chances of survival of young ones is greater in internal fertilisation. Thus internal fertilisation is more advantageous than external fertilisation.

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What is a parthenogenises

Posted by Snehal Shukla 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Jaswanth Sai 7 years, 8 months ago

with out fertilisation organism will fom

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What is reprodution?

Posted by Nishit Prajapati 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Jayaasrii Jayaasrii 7 years, 8 months ago

It is an ability of an organism to produce its own kind of species

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What is pre previlage for smoking

Posted by Asif K 7 years, 8 months ago

CBSE > Class 12 > Biology

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Can you think of how tapetal cells could become bi nucleate?

Posted by Rahul Singh 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Suresh Malik 7 years, 8 months ago

By Endoploidy........

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What is protendry

Posted by Amit Kotnala 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Deep Kaur 7 years, 8 months ago

It is protAndry which development of male organs or maturation of their products before the appearance of the corresponding female product . Thus it prevents self fertilisation & favours cross pollination

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Shajith Shajith 7 years, 8 months ago

Do you mean Prepotency?

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Who discovered cell

Posted by Kiranmayi Balla 7 years, 9 months ago

CBSE > Class 12 > Biology