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Ruba Balu
Subject: Biology
, asked on 8/4/18
Differentiate between perisperm and endosperm giving one example of each
Answer
2
Ruba Balu
Subject: Biology
, asked on 6/4/18
Describe the development of endosperm after double fertilization in an angiosperm. Why endosperm development does proceeds that of zygote?
Answer
3
Aparna Sahu
Subject: Biology
, asked on 5/4/18
Q.66. The phyllotaxy is said to be whorled where
(a) one leaf remain abovc the other
(b) two leaves develop at each node
(c) more than two leaves develop at each node
(d) a pair of leaves stands at right angle to each
Answer
1
Aparna Sahu
Subject: Biology
, asked on 5/4/18
Solve this.
Q22. Tress grown in uniform enviornmental conditions, say as those occuring near the equator, throughout the year will
(a) not show secondary growth
(b) not reveal annual rings with distinct spring and autumn wood
(c) have annual rings which can be used to date the tree
(d) have only xylem formed by activity of cambium
Answer
1
Sandra Saju
Subject: Biology
, asked on 30/3/18
Floral charaters are the basic of classification because
(a) They are more conserved
(b) They are variously pigmented
(c) They can be preserved for longer times
(d) All the above
Answer
2
Aparna Sahu
Subject: Biology
, asked on 30/3/18
Match this following..:
Class Anthozoa
Have a box-shaped medusa; the most venomous group.
Class Scyphozoa
The gonads for sexual reproduction are derived from epidermal tissue instead of gastrodermal tissue
Class Cubozoa
There is no medusa stage within the life cycle
Class Hydrozoa
The medusa is the prominent stage in he life cycle.
Answer
1
Karen Martin
Subject: Biology
, asked on 26/3/18
If there are 640 pollen grains how many gametes are there
Answer
2
Prerna Varshney
Subject: Biology
, asked on 24/3/18
(a) Why is Fertilization in an angiosperm referred to as double fertilization? Mention the ploidy of the cells involved.
Answer
1
Laieeqa
Subject: Biology
, asked on 23/3/18
Q. Prepare a flow-chart to depict the post-pollination events leading to viable-seed production in a flowering plant.
Answer
1
Laieeqa
Subject: Biology
, asked on 23/3/18
Mention the ploidy levels of the cells of different parts of an albuminous seed.
Answer
1
Laieeqa
Subject: Biology
, asked on 23/3/18
Describe with help of three labelled diagrams different embryonic stages that include mature embryo of dicot plants
Answer
1
Rayyan Mansuri
Subject: Biology
, asked on 23/3/18
Solve this :
7. Statement A : The intine of pollen develops as a pollentube and comes out of a germ pore.
Statement R : The exine of the pollen which has prominent aperture where sporopollenin is present.
(A) Statement A and R both arc wrong.
(B) Statement A and R both are correct R is not the explanation of A.
(C) Statement A correct and R wrong,
(D) Statement A and R both are correct. R is the explanation of A.
Answer
1
Tithi
Subject: Biology
, asked on 23/3/18
Even when conditions are optimal, there is no vegetative intermodal propagation in sugarcane. Why?
Answer
1
Charu
Subject: Biology
, asked on 22/3/18
seeds are considered better for the staple food then the vegetative part of the plant .why?...pls answer its urgent
Answer
2
Charu
Subject: Biology
, asked on 22/3/18
Q 8.
How many chrosomes would you except in the following if the diploid number of chromosomes in an angiospermic plant is 18?
(i) Endosperm (ii) Embryo
(iii) Antipodal cell (iv) Integument and nucellus.
Answer
1
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What are you looking for?
(a) one leaf remain abovc the other
(b) two leaves develop at each node
(c) more than two leaves develop at each node
(d) a pair of leaves stands at right angle to each
Q22. Tress grown in uniform enviornmental conditions, say as those occuring near the equator, throughout the year will
(a) not show secondary growth
(b) not reveal annual rings with distinct spring and autumn wood
(c) have annual rings which can be used to date the tree
(d) have only xylem formed by activity of cambium
(a) They are more conserved
(b) They are variously pigmented
(c) They can be preserved for longer times
(d) All the above
7. Statement A : The intine of pollen develops as a pollentube and comes out of a germ pore.
Statement R : The exine of the pollen which has prominent aperture where sporopollenin is present.
(A) Statement A and R both arc wrong.
(B) Statement A and R both are correct R is not the explanation of A.
(C) Statement A correct and R wrong,
(D) Statement A and R both are correct. R is the explanation of A.
(i) Endosperm (ii) Embryo
(iii) Antipodal cell (iv) Integument and nucellus.