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Page 249 4th para. Answer the question.

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

5 answers

K Gopika 7 years, 9 months ago

Your is context bro Mine was just a logical one.

0Thank You

Divyank Darshi 7 years, 9 months ago

Gopika,,,I think it is not real cause,,which u wrote,,,,but I m not sure,,,,it may be

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K Gopika 7 years, 9 months ago

Done

0Thank You

Divyank Darshi 7 years, 9 months ago

Because phytoplanktons are much smaller than the fishes,,,,, though fishes are less in no. Due to their large size the overall biomass of the fishes is larger than phytoplanktons.

1Thank You

K Gopika 7 years, 9 months ago

Because the area of the sea bed is much smaller compared to the volume of water? Which is proportion to the life it can accommodate?

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ANSWER

Explain me that 2nd para of page 249

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

3 answers

K Gopika 7 years, 9 months ago

:p I can . Leave it

0Thank You

K Gopika 7 years, 9 months ago

Page 249. 2nd para.

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Divyank Darshi 7 years, 9 months ago

What u can't understand

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ANSWER

Pg 248 diagas important?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

7 answers

K Gopika 7 years, 9 months ago

???

0Thank You

K Gopika 7 years, 9 months ago

Can we approximate the number??????

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K Gopika 7 years, 9 months ago

Dude no. You'll be asked conceptually. Not the diagram.

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K Gopika 7 years, 9 months ago

Numbers ? Fine. I Need to revise anyway thanks.

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Shristi Raj 7 years, 9 months ago

Pg. 84 fig 5.11???

1Thank You

Shristi Raj 7 years, 9 months ago

It came last year in 5 marker

1Thank You

Divyank Darshi 7 years, 9 months ago

Yes

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ANSWER

Mention the chemical change that proinsuline undergoes to be able to act as mature insuline

Posted by Sushant Kakran 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

K Gopika 7 years, 9 months ago

C peptide

1Thank You

K Gopika 7 years, 9 months ago

That C. Chain will be removed

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ANSWER

Biomass puri is invertible right?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

4 answers

K Gopika 7 years, 9 months ago

Yeah that's what I meant. Thanks both :)

0Thank You

Benedict Sabu 7 years, 9 months ago

Yes. Eg:- phytoplanktons in a pond

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Divyank Darshi 7 years, 9 months ago

Yes for aquatic ecosystem

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K Gopika 7 years, 9 months ago

*pyramid

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ANSWER

Is 14.3 diagram important?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

K Gopika 7 years, 9 months ago

Yeah. That just says like energy is dissipated as heat. And also the fact taht energy flow is unidirectional. Sorry to ask you .,I interpret your name a boy's right?

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Divyank Darshi 7 years, 9 months ago

I think,,,no,,,becoz the diagram is very complicated

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ANSWER

What's 2nd law of thermodynamics

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

K Gopika 7 years, 9 months ago

Done

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Divyank Darshi 7 years, 9 months ago

Every system requires a continuous input of energy.

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ANSWER

give exmple of disordr cause due to single gene mutation

Posted by Aulakh Aulakh 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

K Gopika 7 years, 9 months ago

Dystrophy and thalassemia too

1Thank You

Divyank Darshi 7 years, 9 months ago

Sickle cell anaemia

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ANSWER

Dual purpose served by Deoxyribonucleoside teiphosphate in polymerization?

Posted by Yash Vardhan 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

K Gopika 7 years, 9 months ago

Provides energy and acts as a substrate

3Thank You

ANSWER

What r sence & antisence rna?

Posted by Benedict Sabu 7 years, 9 months ago

CBSE > Class 12 > Biology

5 answers

Divyank Darshi 7 years, 9 months ago

When nematode specific Gene is transferred into the plant it forms a sense and an anti sense RNA .. Both are complementary to each other and joins to form double stranded rna.

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K Gopika 7 years, 9 months ago

They both will for double stranded rna

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K Gopika 7 years, 9 months ago

Cochin?

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K Gopika 7 years, 9 months ago

Sense is 5'-3' and antisense is of opp. Polarity

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K Gopika 7 years, 9 months ago

Complementary

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ANSWER

Plz explain rna interference in few words?

Posted by Benedict Sabu 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

Divyank Darshi 7 years, 9 months ago

Ran-i is the common defence mechanism in eukaryotic cell. In this formation of double stranded rna prevents the translation of pathogen's rna.

2Thank You

K Gopika 7 years, 9 months ago

Pg 209 which your not getting?

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ANSWER

lax operone

Posted by Priya Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

3 answers

Divyank Darshi 7 years, 9 months ago

Lac operon is a unit of prokaryotic Gene expression which contains a structural Gene and some control element that recognised by some regulatory Gene product. It has few components like structural Gene,, promoter,, operator,, regulatory Gene,, inducer.

0Thank You

Benedict Sabu 7 years, 9 months ago

Group of genes involved in lactose catabolism.

2Thank You

Divyank Darshi 7 years, 9 months ago

Lac operone

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ANSWER

lax operon

Posted by Priya Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

K Gopika 7 years, 9 months ago

Scroll down I've answerd it.

1Thank You

ANSWER

aminocentesis

Posted by Aulakh Aulakh 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

Divyank Darshi 7 years, 9 months ago

It is the method of determining the *** of the foetus by determining the chromosome pattern in the amniotic fluid that surrounds the foetus.

0Thank You

K Gopika 7 years, 9 months ago

Fluid around the foetus may contain cells escaped from the foetus. Thus can used to study the genetic disorders and even *** of the baby this is based on the chromosomal pattern. Pg 58

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ANSWER

What is founders effect ????????????????

Posted by Pankaj Sihag 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

Divyank Darshi 7 years, 9 months ago

When there is a large Gene pool than the newly formed population is much different from the original one. Here the original population is the founder of this new population and this pHenomenon is called founders effect.

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K Gopika 7 years, 9 months ago

If the allele frequ2of a population changes so much , by chance ,that the new population becomes a new species , then the previous population is called as founder (since if founded it) and the effect is called as founders effect

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ANSWER

How chill treatment prevents precocious reproductive development

Posted by Amandeep Kumar 7 years, 9 months ago

CBSE > Class 12 > Biology

2 answers

K Gopika 7 years, 9 months ago

Given in book?

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K Gopika 7 years, 9 months ago

0Thank You

ANSWER

Can anybody tell me how to get full marks in exam as I don't know the chapter names before 12 hours from exam..

Posted by Neelesh Mishra 7 years, 9 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Dual purpose served by deoxyribonucleoside phosphate??

Posted by Jasjit Kaur 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

K Gopika 7 years, 9 months ago

Provides energy and acts as a substrate

2Thank You

ANSWER

how bacterial cell are made competent to take up dna

Posted by Aulakh Aulakh 7 years, 9 months ago

CBSE > Class 12 > Biology

3 answers

Divyank Darshi 7 years, 9 months ago

The bacterial cell is treated with divalent cation like calcium ion.. Further the cell is exposed to ice cold medium and then to a heat shock (42°C) and again to ice cold medium.

1Thank You

K Gopika 7 years, 9 months ago

Ok??

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K Gopika 7 years, 9 months ago

Page no. 200,201

1Thank You

ANSWER

Difference between menstrual cycle and oestrus cycle

Posted by Vimlesh Yadav 7 years, 9 months ago

CBSE > Class 12 > Biology

4 answers

Divyank Darshi 7 years, 9 months ago

Menstrual cycle- occurs in primate mammals,,,, organisms are reproductively active throughout their reproductive phase,,,, they are called continuous breeders................ Oestrus cycle=occurs in non primate mammals,,,,, reproductively active during particular period in their reproductive phase,,,,, hence they are called seasonal breeders.

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K Gopika 7 years, 9 months ago

Did you get anything?

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K Gopika 7 years, 9 months ago

Main diff. Is oes is seen in non primate and men. I seen in primates. Blood sheds as fragments in men. While it is absorbed in oes. And *** surge is high during oes. Cycle I mean theyvwill be reproductively active only at that time. While throughout the reproductive phase primates with men. Cycle will be active. ( But in forests only seasonally tell be active)

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K Gopika 7 years, 9 months ago

In examplar solutions it's given

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ANSWER

What's heterologous host?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

5 answers

Divyank Darshi 7 years, 9 months ago

Genetically modified host

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K Gopika 7 years, 9 months ago

Done

1Thank You

Pawan Waraich 7 years, 9 months ago

Then the host in which that gene is inserted is hetrologous host

1Thank You

Pawan Waraich 7 years, 9 months ago

Hetrologous expression is that in which a gene is insert which is normally not present in host

1Thank You

K Gopika 7 years, 9 months ago

#Shags

1Thank You

ANSWER

Are both Australopithecus and homohabilis 2 mya

Posted by Arathy S 7 years, 9 months ago

CBSE > Class 12 > Biology

8 answers

Arathy S 7 years, 9 months ago

Thanku

0Thank You

K Gopika 7 years, 9 months ago

Deepa homoerectus is 1.5 . And homohabilus were 1st. I.e. after Australopithecus

1Thank You

K Gopika 7 years, 9 months ago

1.5 *

0Thank You

K Gopika 7 years, 9 months ago

Because homoerectus is 1.5 so homohabilus must be between 2-1.5 . More precisly they should be of 2mya only

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K Gopika 7 years, 9 months ago

Since it's not given in book we can't confirm. But with sense your right

0Thank You

Deepa Chanwariya 7 years, 9 months ago

Australopithecus 2 mya Homo habilis 1.7 mya

1Thank You

K Gopika 7 years, 9 months ago

1Thank You

Arathy S 7 years, 9 months ago

Pls answer

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ANSWER

Ncert pg no. 97,3rd para,last three lines Acc. To Erwin chargaff , for a double stranded DNA the ratio b/w A & T and G & C are constant and equal to one . And I think purines and pyrimidine are equal in no. So,ratio of A & G and C & T are equal to 1 What should I write in exam???????

Posted by Deepa Chanwariya 7 years, 9 months ago

CBSE > Class 12 > Biology

4 answers

Deepa Chanwariya 7 years, 9 months ago

Ohh sorry I thought the sum of.......... Now i get that. THANKS

2Thank You

K Gopika 7 years, 9 months ago

This is only applicable for double helix dna. Even for single stranded dna as well as rna this cannot ve applied.

1Thank You

K Gopika 7 years, 9 months ago

They generally ask conceptual question in 1 marks So they can't ask this directly

2Thank You

K Gopika 7 years, 9 months ago

Their ratios are same . You just right it as acc to him A/T = G/C = 1

1Thank You

ANSWER

Cam we write that divalent and incubation method both for animal and plants if it's particularly specified?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

4 answers

Pawan Waraich 7 years, 9 months ago

Yeah for this we can

1Thank You

K Gopika 7 years, 9 months ago

If they ask specifically for plant and animals can we mention these two methods?

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K Gopika 7 years, 9 months ago

For plant and animals I the book it's specifically given. But for these two methods(in my question) they have not mentioned it like if it is used for plant or animal cell. So it mean for both right?

0Thank You

Pawan Waraich 7 years, 9 months ago

I m not getting ques.

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ANSWER

is evolution chapter imp

Posted by Chhavi Patni 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

K Gopika 7 years, 9 months ago

Damn important

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ANSWER

Why DNA is hydrophilic

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

6 answers

Pawan Waraich 7 years, 9 months ago

Hmmm

1Thank You

Pawan Waraich 7 years, 9 months ago

Not sure dear .......

1Thank You

K Gopika 7 years, 9 months ago

Leave it . No need

1Thank You

Pawan Waraich 7 years, 9 months ago

It might be due to sugar phosphate backbone

0Thank You

Pawan Waraich 7 years, 9 months ago

Hmm but I m not sure........

0Thank You

K Gopika 7 years, 9 months ago

Because it has got OH groups? No?

1Thank You

ANSWER

LH and FSH are also non ovarian hormones only right?

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology

6 answers

Pawan Waraich 7 years, 9 months ago

Okay

1Thank You

K Gopika 7 years, 9 months ago

I didn't see your answer . I tagged you before that

0Thank You

K Gopika 7 years, 9 months ago

Aman was another guy who said gonadotropin in that post . Thats why tagged

1Thank You

Pawan Waraich 7 years, 9 months ago

What

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K Gopika 7 years, 9 months ago

#shags #aman

1Thank You

Pawan Waraich 7 years, 9 months ago

Hmm these are non ovarian

1Thank You

ANSWER

Kehhsh hhejs

Posted by Gurjant Singh 7 years, 9 months ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Why are analogus structure are the result of convergent evolution

Posted by Abhishek Sood 7 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

K Gopika 7 years, 9 months ago

Analogue means same function but beloved from different ancestor. If you see the wings of butterfly and and a bat their function are same so it's said to be converging

1Thank You

ANSWER

Coding and encoding. What's the difference? Because I'm using both as same

Posted by K Gopika 7 years, 9 months ago

CBSE > Class 12 > Biology