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

Tap root means the main root of a primary root system growing vertically downward. As like :- the edible roots of carrot and beets are specialized also for food storage

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Explain the mechanism of *** determination in insects like drosophilia and grasshopper

Posted by Medha Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

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healthy ecosystems are the base of a wide range of ecosystem services justify

Posted by Nancy N 6 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Meghna Thapar 5 years, 8 months ago

Healthy ecosystems are the base for a wide range of economic, environmental and aesthetic goods and services. The products of ecosystem Processes are named as ecosystem services. For examples, healthy forest ecosystem purifies air and water, minimize droughts and floods, cycle nutrients, generates fertile soils, provides wildlife habitat, maintains biodiversity, pollinate crops, provide storage site for carbon and also provide aesthetic, cultural and spiritual values. Though the value of such services of biodiversity is difficult to determine, it seems reasonable to think that biodiversity should carry a healthy price tag.

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What is polygenic inheritance

Posted by Subhash Chandra 6 years, 7 months ago

CBSE > Class 12 > Biology

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Anu No 6 years, 7 months ago

A single character controlled by many gene

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What do u mean by "molecular traffic inside the cell"?

Posted by Bandita Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Ak Ak 5 years, 11 months ago

i love you

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Do respiration, digestion comes under metabolism?

Posted by Bandita Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

4 answers

Ak Ak 5 years, 11 months ago

can you give me yours

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Ak Ak 5 years, 11 months ago

hello

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Ak Ak 5 years, 11 months ago

hi mini

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Mini Chaudhary 6 years, 7 months ago

Yes respiration and digestion comes under metabolism

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what is meant by biological magnification

Posted by Karan Rathod 6 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Abhiyank Rajouria 6 years, 7 months ago

Biomagnification, also known as bioamplification or biological magnification, is the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain.

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I want a trick for learning all conference of parties (cop) names of city and country where it was held From COP1 - COP 24

Posted by Kapil Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

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What is the location and function of leyding cell and sertoli cell in human male reproductive system

Posted by Anish Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

2 answers

Shivam Chaurasia 6 years, 7 months ago

Sertoli cell providing nutrition while leydig cell secreste androgens help in initiation of spermatogenesis

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Ďãřşháñăã Yadav ? ? ? 6 years, 7 months ago

location of sertoli cell :- within the lining of seminiferous tubules of T E S T I S. FUNCTION OF sertoli cell :- they provide nutrition to the developing sperm or Germ cell. Location of leydig cell :- in the interstitial space between seminiferous tubules. FUNCTION OF leydig cell :- they synthesis and secrete male hormone. i. e, androgen.

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What is the functions of germ pore?

Posted by Gazala Yusuf 6 years, 7 months ago

CBSE > Class 12 > Biology

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Shivam Chaurasia 6 years, 7 months ago

Providing site foe formation of pollen tube.

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Cbse question pattern for class Xll biology 2020

Posted by Mousumi Roy 6 years, 7 months ago

CBSE > Class 12 > Biology

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Explain the 3 phases of sexual reproduction.

Posted by Ashosh Singh 6 years, 7 months ago

CBSE > Class 12 > Biology

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Biology mai chapter kuch remove hue haii kyaa

Posted by Sonu Verma 6 years, 7 months ago

CBSE > Class 12 > Biology

5 answers

Amrita Mohanty 6 years, 7 months ago

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Lavi Kadiyan 6 years, 7 months ago

Nhi

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Gazala Yusuf 6 years, 7 months ago

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Srishti Choudhary ✍⏳ 6 years, 7 months ago

Nope...no

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Khushali Singh 6 years, 7 months ago

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Write a short on pollen grain

Posted by Anugraha Kar 6 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Yogita Ingle 6 years, 7 months ago

Each pollen grain is a tiny spherical structure, surrounded by 2 layers:

Exine

Hard, outer layer
Composed of sporopollenin
Highly resistant

Intine

Thin inner layer
Composed of cellulose & pectin

Formation of a pollen grain from microspore involves the following changes:

Expansion of the microspore
Formation of a large vacuole
Microspore nucleus displaced to an eccentric position against microspore wall
Nucleus undergoes first pollen mitosis

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Kya board exams me sirf ncert se hi question puche jaate h????

Posted by Lavi Kadiyan 6 years, 7 months ago

CBSE > Class 12 > Biology

1 answers

Ashu Panchal 6 years, 7 months ago

Nahi chapter k bich me se bhi aa sakta ha

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Vasectomy and tubectomy with diagram please explain?

Posted by Lavi Kadiyan 6 years, 7 months ago

CBSE > Class 12 > Biology

4 answers

Lavi Kadiyan 6 years, 7 months ago

In which class are u in

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Lavi Kadiyan 6 years, 7 months ago

I think u r so intelligent that u gave all answers of my questions

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Lavi Kadiyan 6 years, 7 months ago

Ohkkk thankuu rani dii

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Rani Jojo Jojo 6 years, 7 months ago

Surgical method of contraception.vasectomy cutting or tieing of vas deferance in male to prevent the sperm transport and fusion with egg.Tubectomy in female .Here fallopian tube id tied or cut to prevent the tranaport of egg.

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Why is the Human Genome project called a mega project??

Posted by Srishti Choudhary ✍⏳ 6 years, 7 months ago

CBSE > Class 12 > Biology