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Which division occur in sporogenous cells in microsporangium, mitotic or meiotic?

Posted by Rupesh Singh 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Ritesh Kumar 7 years, 8 months ago

Meiotic

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Viruses are livig or not

Posted by Gurpreet Kaur 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Saumya Agrawal 7 years, 8 months ago

Actually they act like interlink between living and nonliving

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ANSWER

Is seed living or non living?

Posted by Jagnoor Singh 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Explain the ploidy of chara and give knowledge about their reproductive organ?

Posted by Liyazuddin Ansari 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Meiocytes

Posted by Mansi Jaiswal 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Swati Kandpal 7 years, 8 months ago

Meiocytes are the cell which undergo meiosis

1Thank You

ANSWER

What happen with pollen grain after pollination

Posted by Naina Karki 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

explain partition in easy way

Posted by Harsh Agarwal 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Vennila Murali 7 years, 8 months ago

Paturation is simply coming out of baby from mother womb.first signal is sent from foetus and placenta. Oxytocin is secreted which is responsible for broadening of uterus.

1Thank You

Harsh Agarwal 7 years, 8 months ago

parturition h.. partition ni h..

1Thank You

ANSWER

lesson 3

Posted by Satyam Agrahari 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Satyam Agrahari 7 years, 8 months ago

lesson 3

5Thank You

ANSWER

If tubectomy is donewhy do menstruation cycle occur?

Posted by Kitty Gudadhe 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Vennila Murali 7 years, 8 months ago

Yes ,menstrual cycle occurs because normal thickening of uterus layer takes place continously.But egg will remain ovary.

1Thank You

Neha Sagar 7 years, 8 months ago

Yes menstrual cycle occurs egg will also produce but egg will not come in the uterus

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ANSWER

What is colon

Posted by Abhishek Tiwary 7 years, 8 months ago

CBSE > Class 12 > Biology

3 answers

Shaily Ameta 7 years, 8 months ago

colon is the main part of large intestine which absorb water and elecyrolytes from food

1Thank You

Shaily Ameta 7 years, 8 months ago

it is clone not colon

0Thank You

Charvi Ameta 7 years, 8 months ago

new organism genetically,morphologically similar to each other.

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Free nuclear division ka example

Posted by Durga Ji 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

What is double and triple fertilisation

Posted by Durga Ji 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Saumya Agrawal 7 years, 8 months ago

When syngamy and triple fusion occur simultaneously then it was known as double fertilization

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What would ploidy if tetrad cell

Posted by Sakshi Tiwari 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Tamanna Saharan 7 years, 8 months ago

hapoid chromosomes no.

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ANSWER

Male honeybee has 16 chromosome but female has 36 chromosome. Why???

Posted by Sahil Bhai Patre 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Swarnika Sahu 7 years, 8 months ago

Male honeybees are born from unfertilised eggs by the process known as parthenogenesis where as female honeybees are born from fertilised eggs. As unfertilised eggs carries only half number of chromosome as compared to fertilised eggs, therefore male honeybee has 16 chromosomes whereas female has 32 chromosomes.

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Explain dehiscence

Posted by Sakshi Tiwari 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Saumya Agrawal 7 years, 8 months ago

Bursting of wall of anther for releasing pollengraina

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Difference between haploid and diploid

Posted by Khushi Mishra 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Saumya Agrawal 7 years, 8 months ago

Flowers only having stamen called staminate Flowers only having pistil called pistillate

0Thank You

Khushi Mishra 7 years, 8 months ago

Difference between staminate pistillate

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ANSWER

Restriction enzyme ??

Posted by Malar Vizhi 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

What is inactive state of embryo called as?

Posted by Kanishka Kapoor 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Aman Verma 7 years, 8 months ago

Dormancy

1Thank You

ANSWER

Father of botany.

Posted by Shivam Kumar 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Kanishka Kapoor 7 years, 8 months ago

Theophrastus

2Thank You

ANSWER

Father of indian biology ????????

Posted by Sai Sai 7 years, 8 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

For bio which refference book is best for board examination of 12 class

Posted by Shagufta Shabnam 7 years, 8 months ago

CBSE > Class 12 > Biology

9 answers

Neha Sagar 7 years, 8 months ago

NCERT is the best book for 12 and for every enterance exam also

0Thank You

Sweta Acharya 7 years, 8 months ago

Abc for botany nd kp for zoology

0Thank You

Rhitika Rai 7 years, 8 months ago

abc is better for 12

0Thank You

Soni Mahto 7 years, 8 months ago

Arihent is a best book for biology

1Thank You

Rozy Khan 7 years, 8 months ago

Ncert of bio + arihant

0Thank You

Tarun S R 7 years, 8 months ago

Ncert txtbook

0Thank You

Adil Parvez 7 years, 8 months ago

Best of best is only NCERT ...

0Thank You

Priya Goswami 7 years, 8 months ago

You must follow Dinesh refresher

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Sai Sai 7 years, 8 months ago

All in one biology

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Why hybrids are grown year after year

Posted by Pratibha Sharma 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Neha Subba 7 years, 8 months ago

because if the seed of hybridised plant are again sown to give new plant therr may be genetic variation and therecissive gene get chance to show off. therefore the offsring is not that too good

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Can I leave my additional subject biology in class 12

Posted by Dipannita Ray 7 years, 8 months ago

CBSE > Class 12 > Biology

2 answers

Isha Ahuja 7 years, 8 months ago

U can leave bt its better if u leave this year only if u r nt able to handle it becoz i also have leaved my add maths

0Thank You

Aman Chhillar 7 years, 8 months ago

U may but don't bcoz it'll help you increase ur +2 percentage

1Thank You

ANSWER

What is resource

Posted by Manoj Singh 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Kriti Mishra 7 years, 8 months ago

Anything which are present around us through which we can fulfill our needs are termed as resourse .

1Thank You

ANSWER

10 points on algae and fungi

Posted by Manvendra Sharma 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Shubham Mamgain 7 years, 8 months ago

ALGAE::One definition is that algae "have chlorophyll as their primary photosynthetic pigment and lack a sterile covering of cells around their reproductive cells".[2] Some authors exclude all prokaryotes[3] and thus do not consider cyanobacteria (blue-green algae) as algae.[4] Algae constitute a polyphyletic group[3] since they do not include a common ancestor, and although their plastids seem to have a single origin, from cyanobacteria,[5] they were acquired in different ways. Green algae are examples of algae that have primary chloroplasts derived from endosymbiotic cyanobacteria. Diatoms and brown algae are examples of algae with secondary chloroplasts derived from an endosymbiotic red alga.[6] Algae exhibit a wide range of reproductive strategies, from simple asexual cell division to complex forms of sexual reproduction.[7] Algae lack the various structures that characterize land plants, such as the phyllids (leaf-like structures) of bryophytes, rhizoids in nonvascular plants, and the roots, leaves, and other organs found in tracheophytes (vascular plants). Most are phototrophic, although some are mixotrophic, deriving energy both from photosynthesis and uptake of organic carbon either by osmotrophy, myzotrophy, or phagotrophy. Some unicellular species of green algae, many golden algae, euglenids, dinoflagellates, and other algae have become heterotrophs (also called colorless or apochlorotic algae), sometimes parasitic, relying entirely on external energy sources and have limited or no photosynthetic apparatus.[8][9][10] Some other heterotrophic organisms, such as the apicomplexans, are also derived from cells whose ancestors possessed plastids, but are not traditionally considered as algae. Algae have photosynthetic machinery ultimately derived from cyanobacteria that produce oxygen as a by-product of photosynthesis, unlike other photosynthetic bacteria such as purple and green sulfur bacteria. Fossilized filamentous algae from the Vindhya basin have been dated back to 1.6 to 1.7 billion years ago.[11]

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ANSWER

Algae and fungi

Posted by Manvendra Sharma 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Aman Chhillar 7 years, 8 months ago

?????

0Thank You

ANSWER

What is implantation ?

Posted by Annu Kharb 7 years, 8 months ago

CBSE > Class 12 > Biology

1 answers

Shubham Mamgain 7 years, 8 months ago

In humans, implantation is the stage of pregnancy at which the already fertilized egg adheres to the wall of the uterus. At this stage of prenatal development, the conceptus is called a blastocyst. It is by this adhesion that the fetus receives oxygen and nutrients from the mother to be able to grow.

1Thank You

ANSWER

Why is genotype anf phenotype ratio same in test cross?

Posted by Vikitha M 7 years, 8 months ago

CBSE > Class 12 > Biology