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According to my experience I'll advise u s.l arora for phy.. Pradeeps for chemistry and ncert is enough and bst for bio... And u can also go for examidea for bio.:/

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What is isogamy

Posted by Ayush Raj 7 years, 9 months ago

CBSE > Class 12 > Biology

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Objectives of biology

Posted by Pritam Dangi 7 years, 9 months ago

CBSE > Class 12 > Biology

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Flow diagram of ecosystem

Posted by Lochna Mathpal 7 years, 9 months ago

CBSE > Class 12 > Biology

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Zoospores

Posted by Anu Elizabeth 7 years, 9 months ago

CBSE > Class 12 > Biology

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Vidhi Rawat 7 years, 9 months ago

They are unisexual motile spores

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Maninder Singh 7 years, 9 months ago

a spore of certain algae, fungi, and protozoans, capable of swimming by means of a flagellum.

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What is haplontic lifecycle

Posted by Jashan Kailey 7 years, 9 months ago

CBSE > Class 12 > Biology

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Jaya Shanti 7 years, 9 months ago

A zygotic meiosis is a meiosis of a zygote immediately after karyogamy, which is the fusion of two cell nuclei. This way, the organism ends its diploid phase and produces several haploid cells. ... The individuals or cells as a result of mitosis are haplonts, hence this life cycle is also called haplontic life cycle.

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What is haplontic life cycle in chp1

Posted by Jashan Kailey 7 years, 9 months ago

CBSE > Class 12 > Biology

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Offset

Posted by Tosif Ansari 7 years, 9 months ago

CBSE > Class 12 > Biology

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Tosif Ansari 7 years, 9 months ago

Aquatic plant

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Describe microbes as source of food

Posted by Pratik Tirpude 7 years, 9 months ago

CBSE > Class 12 > Biology

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Jaya Shanti 7 years, 9 months ago

Microorganisms in food production. Nature uses microorganisms to carry out fermentation processes, and for thousands of years mankind has used yeasts, moulds and bacteria to make food products such as bread, beer, wine, vinegar, yoghurt and cheese, as well as fermented fish, meat and vegetables.

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What happens to corpus luteum female if the ovum is 1)fertilized 2)not fertilized?

Posted by Kajal Malik 7 years, 9 months ago

CBSE > Class 12 > Biology

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Jaya Shanti 7 years, 9 months ago

Once it releases its egg, the empty ovarian follicle develops into a new structure called the corpus luteum. The corpus luteum secretes the hormones estrogen and progesterone. ... If the egg is not fertilized, it passes through the uterus.

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￰परखनली सिसु पर टिप्पणी लिखिए

Posted by Ashish Kujur 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

Gullu Verma 7 years, 9 months ago

Are you mad

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Is parthenogenesis process can occur in human being?

Posted by Abhay Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

Jaya Shanti 7 years, 9 months ago

That is an interesting question because it overlaps the question of why animals still reproduce sexually when asexual reproduction is genetically twice as favourable to the parent. The short answer to that appears to be that over the long term (tens to hundreds of thousands of years or more), those who retain sexual reproduction out-compete those who lose it, due to greater ability to adapt to the environment. Thus over time, we get meta-selection for lineages with more and more barriers to becoming asexual. Mammals in general appear to be a prime example. Hence no confirmed case of parthenogenesis has been observed in humans, and it is unlikely to ever be, because so many barriers to it have evolved.

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Define Mitosis briefly

Posted by Angel Raval 7 years, 9 months ago

CBSE > Class 12 > Biology

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Kajal Malik 7 years, 9 months ago

Mitosis is a asexual reproduction it helps in genetic respiration, regeneration etc

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Define the term vegetative phase?

Posted by Shita Kujur 7 years, 9 months ago

CBSE > Class 12 > Biology

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K Nagendra Prasad 7 years, 9 months ago

It is the phase of growth before the start of reproductive phase

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What's is reproduction

Posted by Dipendra Kumar 7 years, 9 months ago

CBSE > Class 12 > Biology

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Puneeth Asha Rani V 7 years, 9 months ago

It is the biological process In which organism produces Young ones similar to itsepf

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Transferring the re combined dna

Posted by Aman Pawar 7 years, 9 months ago

CBSE > Class 12 > Biology

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Why the sexual reproduction need in nature instant of asexual reproduction are already in nature

Posted by A Kay 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

Shivansh Porwal 7 years, 9 months ago

So that variation can occuur

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Autoclave

Posted by Abhay Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

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Not primary air pollution

Posted by Ritesh Yadav 7 years, 9 months ago

CBSE > Class 12 > Biology

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What are cell division

Posted by Ritika Bajpai 7 years, 9 months ago

CBSE > Class 12 > Biology

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Meaning of libido

Posted by Arpit Saini 7 years, 9 months ago

CBSE > Class 12 > Biology

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Asexual reproduction

Posted by Shashank Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

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Bartholin's glans situated in

Posted by Raghav Srth 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

Anonymous P 7 years, 9 months ago

Opening of ******

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Raghav Srth 7 years, 9 months ago

Opening of ******

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List the changes observe in an angiosperm flower subsequent to pollination and fertilisation

Posted by Aman Gupta 7 years, 9 months ago

CBSE > Class 12 > Biology

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Jaya Shanti 7 years, 9 months ago

Some floral parts may fuse with fruit but mostly they wither and fall off.

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Jaya Shanti 7 years, 9 months ago

Integuments develop into seed coats.

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Jaya Shanti 7 years, 9 months ago

Primary endosperm cell gives rise to endosperm.

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Jaya Shanti 7 years, 9 months ago

Zygote develops into an embryo.

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What are poultry animals? what do we get from them?

Posted by Abhi Angle 7 years, 9 months ago

CBSE > Class 12 > Biology

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Why water hyacinth is known as terror of Bengal

Posted by Mohan Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

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Jaya Shanti 7 years, 9 months ago

because it is an exotic shrub which strongly competes with the native species and has also eliminated many of them. ... This plant was introduced by European.

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Anonymous P 7 years, 9 months ago

Because it takes in all the dissolved oxygen from water killing all the fishes in the water.

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Why sexual reproduction occur only in infavourable condition?

Posted by Abhay Singh 7 years, 9 months ago

CBSE > Class 12 > Biology