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Questions asked by priyanka.clay6
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1352
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answers selected
The point of intersection of the curves $x^2 = y$ and $y^2 = x$ is
sat
math
linear-equations
no calculator
asked
Mar 31, 2019
1
answer
Simplify : $(2x^2 - 3x +1) \div (2x-1)(x+1)$
sat
math
quadratic-equations
no calculator
asked
Mar 31, 2019
1
answer
The vertex form of the parabola $f(x) = 2x^2 - 4x+1$ is
sat
math
quadratic-equations
no calculator
asked
Mar 31, 2019
1
answer
$y = a(x+3)(x-4)$ <br> In the quadratic equation above, $a$ is a non zero constant. The graph of the equation in the $xy$-plane, is a parabola with vertex $(c, d)$. Which of the following is equal to $d$ ?
sat
math
quadratic-equations
no calculator
asked
Mar 30, 2019
1
answer
The factors of the equation : $x^2 - x - 42$ are
sat
math
quadratic-equations
no calculator
asked
Mar 30, 2019
1
answer
From the fig. given below, what is the value of $x$ and $y$, if $2x - y =45^{\circ}$
sat
math
lines angles and triangles
no calculator
asked
Mar 30, 2019
1
answer
The function $f$ is defined by a polynomial. Some of the values of $x$ and $f(x)$ are given in the table below. Which of the following must be a factor of $f(x)$ ?
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
The $x$ and $y$ are intercept of the line $y = 4x + 12$
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
What is the value of $p$ if the system of equation $px + 3y =5$ and $3x-5y=6$ has no solution ?
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
$y = mx + 5$, where $m$ is the constant, which is graphed in the $xy$-plane. If the line contains $(p,q)$ as a point where, $p \neq 0, \; q \neq 0$, where is the slope of the line in terms of $p$ and $q$?
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
If $x+3y=15, \; 2x + y =9$ is a given system of equations, what can be the value of $\large\frac{x}{y}$ ?
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
If $\frac{2x}{3} = \frac{x+5}{3}$, what is the value of $x$ ?
sat
math
linear-equations
no calculator
asked
Mar 30, 2019
1
answer
Explain the following terms : False fruit ,True fruit, Parthenocarpic fruit, Apomixis, Polyembryony,.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Explain the following terms : Non-albuminous, Albuminous, Perisperm, Pericarp, seed dormancy.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Describe the development of male gametophyte in angiosperms.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Trace the development of a mature female gametophyte from a megaspore mother cell.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Explain the pollen pistil interaction with a sketch showing entry of pollen tube into a synergid.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
What are the characteristics of wind ,water and insect pollinated flowers ?
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Continued self-pollination result in inbreeding depression.What are the out breeding devices developed in flowering plants to discourage self-pollination? Which type of pollination seen in Papaya ?
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Draw an embryo sac of flowering plants and label the parts: <br> a. Which guides the entry of the pollen tube? <br> b. Which develops into endosperm <br> c. Which develops with male gamete to form the zygote? <br> d. What will be the fate of antipodal cells after fertilization? <br> e. Name the cell that develops into an embryo sac. <br> f. How many embryo sacs are formed from one megaspore mother cell. <br>
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Draw a well-labelled diagram of the L.S of embryo of grasses. How does it differ from that of bean.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
Represent diagrammatically the formation of an embryo sac from a megaspore mother cell.
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
“Dehydration of seed increases their shelf life” – Explain <br> Cleistogamous flowers are strictly self pollinating,” Explain. What is the disadvantage of this phenomenon?
cbsc
class12
biology
sexual reproduction in plants
sec-d
asked
Feb 11, 2019
1
answer
A student wants to know the ploidy of coconut. After studying its different parts he inferred the ploidy of the following parts. Check whether the student is correct. <br> <br> a. Water inside the fruit - n <br> b. White Kernal - 2n <br> c. Seed coat - n <br> d. Embryo - 3n <br> e. Tepal - 2n
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Define triple fusion. What is the product of this process ? What does the product develop into ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Generally nucellus does not persist in mature seeds. Cite two examples which show persistence of nucellus in the seed and what name is given to the persistent nucellulus ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
What do you means by seed dormancy ? What is its significance ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
What are advantages of seeds to Angiosperms ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Explain free nuclear endosperm development.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
What is pollination and explain its types ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Explain double fertilization schematically.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Explain the structure of pollen grain.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Explain the structure of microsporangium.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Differentiate between microsporogenesis and megasporogenesis. What type of cell divisions occur in these ? Name the two structures formed at the end of these two events.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Continued self pollination leads to inbreeding depression. List three devices which flowering plants have developed to discourage self pollination.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
How is pollination effected in Vallisneria ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Differentiate between monoecious and dioecious plants, with an example for each.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Enumerate the steps in artificial hybridisation.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Trace the development of the mature ovule from a megaspore mother cell.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 11, 2019
1
answer
Explain the phenomenon of double fertilization in angiospermic plants.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 9, 2019
1
answer
List any three mechanisms plants follow to overcome inbreeding depression.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 9, 2019
1
answer
"Apomictic genes are trying to be inserted in hybrid varieties". Explain.
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 9, 2019
1
answer
Pollination and seed formation are very crucial for fruit formation. How will you explain this statement ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 9, 2019
2
answers
What is the fate of the following in the development of fruit and seed ?
cbsc
class12
biology
sexual reproduction in plants
sec-c
asked
Feb 9, 2019
1
answer
If one can induce parthenocarpy through the application of phytohormones, which fruit would you select to induce parthenocarpy and why ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 9, 2019
1
answer
How does the flower of maize and cannabis are pollinated ? What are the features found in these flowers for such type of pollination ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 9, 2019
1
answer
Your friend would like to cross-pollinate the bisexual flower. How can you guide him to be successful in his experiment ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
1
answer
What will be the fate of ovule if the synergids are absent in the embryo sac ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
1
answer
Why do you think that the zygote is dormant for some time in a fertilized ovule ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
1
answer
How long do the seeds remain alive after they are dispersed ?
cbsc
class12
biology
sexual reproduction in plants
sec-b
asked
Feb 8, 2019
1
answer
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