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Mannan
Subject: Science
, asked on 14/3/18
Name two homologus structures in vertebrates
Answer
3
Champ Jee
Subject: Science
, asked on 14/3/18
Aren't potato and ginger homologous because they both are underground stems?
Answer
1
Aditi Sharma
Subject: Science
, asked on 14/3/18
How are birds related to reptiles? Which example so we need to use - Archaeopteryx or Dromaesaur? Dromaesaur is given in NCERT.
Answer
2
Samyuktha M. S
Subject: Science
, asked on 14/3/18
Solve this:
Q.7. A study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive ? Why or why not ?
Q.8. (a). Why does the sky appear dark instead of blue to an astronaut ?
(b) What happens to image distance in human eye when an object moves away from the eye ?
Answer
5
Samyuktha M. S
Subject: Science
, asked on 14/3/18
Solve this:
Q.6. The construction of large dams lead to (i) social and (ii) environmental problems. List two problems in each case.
Q.7. What are the different ways in which individuals with a particular trait may increase in a population ?
Answer
5
Mithuna
Subject: Science
, asked on 13/3/18
Why is the number of chromosomes in a sex cell of a human being 23? where have the rest gone? Aint that he received half from father and half from mother, So how come it became 23?!!! ALL THE CELLS IN OUR BODY HAS 46 CHROMOSOMES EACH, SO ISNT IT THAT ALL THE CELLS IN OUR BODY HAS X AND Y (SEX CHROMOSOME, SUPPOSE A Boy) IN EVERY CELL OF HIS ? Please explain clearly Im confused.....NO links please....
Answer
3
Mithuna
Subject: Science
, asked on 13/3/18
Q. Explain how sexual reproduction gives rise to more viable reproduction (capable of reproduction again) than asexual reproduction. =ANSWER:1)Errors in DNA copy. 2)crossing over at the time of meiosis 3)independent Inheritance of traits 4)random fusion of gametes. PLEASE EXPLAIN THESE POINTS AND MAKE ME UNDERSTAND THIS ANSWER.
Answer
1
Srivishnu Thatha
Subject: Science
, asked on 13/3/18
what is organic evolution? how do embryological studies provide evidence for evolution?
Answer
1
Payal Arora
Subject: Science
, asked on 12/3/18
What are the factors that lead to evolution ?
Answer
3
Payal Arora
Subject: Science
, asked on 12/3/18
WHICH OF THEM HELPS IN THE INCREASE OF A TRAIT IN A POPULATION GEOGRAPHICAL ISOLATION OR ENVIRONMENTAL FACTORS ?
Answer
1
Champ Jee
Subject: Science
, asked on 12/3/18
Q.14 Is the answer B blood group and O blood group in ratio of 1:1?
14
.
A
man
having
blood
group
O
I
0
I
0
marries
a
woman
with
blood
group
B
I
B
I
0
.
What
will
be
the
blood
group
of
their
children
?
Answer
5
Champ Jee
Subject: Science
, asked on 7/3/18
This statement is from NCERT pH no. 155. Topic - Evolution by stages.
According to me, this statement very well contradicts the analogous organ theory, that for diff structures, they don't have common ancestor!!!
Answer
5
Champ Jee
Subject: Science
, asked on 7/3/18
I didn't understand this concept:
How analogous organs can help in tracing evolutionary relationship? If their structures are different, means they are from different ancestors. How can we call it evidence; for what?
Answer
1
Anu
Subject: Science
, asked on 7/3/18
here are a few pairs.state which are homolougous and analogous with reason
1.wings of butterfly and a bat
forelimbs of cow and a duck
3.wings of pigieon and a butterfly
4.wings of pigieon and butterfly
Answer
1
Anu
Subject: Science
, asked on 7/3/18
between carrot potatoe ginger radish sweet potato which pair is homologous and analogous?
Answer
1
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Q.7. A study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive ? Why or why not ?
Q.8. (a). Why does the sky appear dark instead of blue to an astronaut ?
(b) What happens to image distance in human eye when an object moves away from the eye ?
Q.6. The construction of large dams lead to (i) social and (ii) environmental problems. List two problems in each case.
Q.7. What are the different ways in which individuals with a particular trait may increase in a population ?
According to me, this statement very well contradicts the analogous organ theory, that for diff structures, they don't have common ancestor!!!
How analogous organs can help in tracing evolutionary relationship? If their structures are different, means they are from different ancestors. How can we call it evidence; for what?
1.wings of butterfly and a bat
forelimbs of cow and a duck
3.wings of pigieon and a butterfly
4.wings of pigieon and butterfly