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Recent questions tagged ch1
ASK
Honeybees produce their young ones only by sexual reproduction, in spite of this, in a colony of bee
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 20, 2017
by
pady_1
1
answer
Differentiate between (a) Oestrous and Menstrual cycles; (b) Ovipary and Vivipary. Cite an example f
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 14, 2017
by
pady_1
1
answer
Enumerate the differences between asexual and sexual reproduction.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 14, 2017
by
pady_1
1
answer
Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. On the other
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. On the other
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Although sexual reproduction is a long drawn, energy intensive complex form of reproduction, many gr
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Do all the gametes formed from a parent organism have the same genetic composition (identi
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-e
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Justify the statement 'Vegetative reproduction is also a type of asexual reproduction'.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Suggest a possible explanation why the seed in a pea pod are arranged in a row, whereas those in tom
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
List the changes observed in an angiosperm flower subsequent to pollination and fertilization.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
List the changes observed in an angiosperm flower subsequent to pollination and fertilization.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Is it possible to consider vegetative propagation observe in certain plants like Bryophyllum, water
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
With which type of reproduction do we associate the reduction division ? Analyse the reasons for it.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
The number of texa exhibiting asexual reproduction is drastically reduced in higher plants (ang
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-c
reproduction in organisms
asked
Jun 12, 2017
by
pady_1
1
answer
Which of the following are monoeciuos and dieocious organisms?
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Give reasons as to why cell division cannot be a type of reproduction in multicellular organism.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Is there a relationship between the size of an organism and its life span ? Give two examples in sup
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowe
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Although potato tuber is an underground part, it is considered as a stem. Give two reasons.
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
In haploid organism that undergo sexual reproduction, name the stage in the life cycle when meiosis
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
What do the following parts of a flower develop into after fertilization ?
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
In haploid organism that undergo sexual reproduction, name the stage in the life cycle when meiosis
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-b
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Between an annual and a perennial plant, which one has a shorter juvenile phase? Give one reaso
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 11, 2017
by
pady_1
1
answer
Why do we refer to offspring formed by asexual method of reproduction as clones ?
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 9, 2017
by
pady_1
1
answer
Mention two inherent characteristics of Amoeba and yeast that enable them to reproduce ase
cbse
class12
ch1
exemplar
theoryquestion
biology
sec-a
reproduction in organisms
asked
Jun 9, 2017
by
pady_1
1
answer
An oil company has two depots A and B with capacities of 7000 L and 4000 L respectively. The company is to supply oil to three petrol pumps, D, E and F whose requirements are 4500L, 3000L and 3500L respectively. Assuming that the transportation cost of 10 litres of oil is Rs 1 per km, How should the delivery be scheduled in order that the transportation cost is minimum ? What is the minimum cost? The distance (In km) between the depots and the petrol pumps is given in the following table :
cbse
class12
maths
ch1
sec-e
asked
Dec 27, 2016
by
priyanka.c
1
answer
Find the area of the region $\{ (x,y) : 0 \leq y \leq x^2, 0 \leq y \leq x+2 , 0 \leq x \leq 3\}$
cbse
class12
maths
ch1
sec-e
asked
Dec 27, 2016
by
priyanka.c
1
answer
Find the image of the point (1, 3. 4) in the plane $x-y+z =5$. Hence show that the image lies on the plane $x -2y +z -7 = 0$
cbse
class12
maths
ch1
sec-e
asked
Dec 27, 2016
by
priyanka.c
1
answer
Radioactive wastes is to be disposed of in full enclosed lead boxes of inner volume $200 cm^3$. The base of the box has dimension in the ratio 2:1 . What is the inner length of the box. Find the minimum inner surface area of the box.
cbse
class12
maths
ch1
sec-e
asked
Dec 22, 2016
by
priyanka.c
1
answer
Rent -a-car has three different makes of vehicles P, Q and R for hire. These cars are located at stations A and B on either side of a city. Some cars are being rented. In total they have 150 cars. At station A, they have 20% of P, 40% of Q and 30% of R which is 46 cars in total. At station B they have 40% of P, 20% of Q and 50% of R which is 54 cars in total. How many of each cars types does Rent-a -car have ?
cbse
class12
maths
ch1
sec-e
asked
Dec 22, 2016
by
priyanka.c
1
answer
Integrate $\begin{align*} \int \frac{\sin(x+a)}{\sin (x+b)} dx\end{align*} $
cbse
class12
maths
ch1
sec-c
asked
Dec 22, 2016
by
priyanka.c
1
answer
Express the matrix $A = \begin{bmatrix} 3 & 2 & 3 \\ 4 & 5 & 3 \\ 2 & 4 & 5 \end{bmatrix}$ as the sum of a symmetric and a skew symmetric matrix.
cbse
class12
maths
ch1
sec-c
asked
Dec 22, 2016
by
priyanka.c
1
answer
Assume that each child born is equally likely to be a boy or a girl. If a family has two children, what is the conditional probability that both are girls given that
(a) The youngest is a girl.
(b) At least one is a girl.
Pre-natal *** determination is a crime. What will you do if you come to know that some of your known is indulging in pre-natal *** determination ?
cbse
class12
maths
ch1
sec-c
asked
Dec 22, 2016
by
priyanka.c
1
answer
Evaluate $\begin{align*} \int \limits_{-1}^{3/2} |x \sin {\pi \; x}| dx \end{align*}$
cbse
class12
maths
ch1
sec-c
asked
Dec 21, 2016
by
priyanka.c
1
answer
Find the condition that the curves $2x= y^2$ and $2xy = k $ intersect orthogonally.
cbse
class12
maths
ch1
sec-c
asked
Dec 21, 2016
by
priyanka.c
1
answer
Differentiate $x ^{\sin ^{-1} x}$ w.r.t $\sin^{-1} x$
cbse
class12
maths
ch1
sec-c
asked
Dec 21, 2016
by
priyanka.c
1
answer
For what value of $a$ and $b$ is the function $f(x) = \begin{cases} x^2 ,& x \leq c \\ ax+b , & x> c \end{cases} $ is differentiable at $x=c$
cbse
class12
maths
ch1
sec-c
asked
Dec 21, 2016
by
priyanka.c
1
answer
On the set $R -\{ -1\} $ a binary operation $\ast$ is defined by $a \ast b = a + b + ab$ for all $a,b \in R - \{-1\}$. Prove that $\ast$ is commutative as well as associative on $R -\{-1\}$. Find the identity element on $\ast$ if any.
cbse
class12
maths
ch1
sec-c
asked
Dec 21, 2016
by
priyanka.c
1
answer
Using differentials, find the appropriate value of $[0.009] ^ {\frac{1}{3}}$
cbse
class12
maths
ch1
sec-b
asked
Dec 20, 2016
by
priyanka.c
1
answer
If $\overrightarrow {b} \times \overrightarrow {c} = \overrightarrow {c} \overrightarrow {a} \neq 0$, then $\overrightarrow{a} + \overrightarrow {b} = k \overrightarrow {c}$ where k is any scalar.
Is it true or false .
cbse
class12
maths
ch1
sec-b
asked
Dec 20, 2016
by
priyanka.c
1
answer
From the differential equation of the family of curves $y = A \sin 2x + B \cos 2x$
cbse
class12
maths
ch1
sec-b
asked
Dec 20, 2016
by
priyanka.c
1
answer
If $y = 7x -x^3$ and $x$ increases at the rate of 4 units per second. How fast is the slope of the curve changing when $x=2$
cbse
class12
maths
ch1
sec-b
asked
Dec 20, 2016
by
priyanka.c
1
answer
Determine the order and degree in the differential equation. Also state if it is a linear or non linear.
$y +\frac{dy}{dx} = \frac{1}{4} \int y dx $
cbse
class12
maths
ch1
sec-a
asked
Dec 20, 2016
by
priyanka.c
1
answer
Let $\ast \; R \times R \to R$ given by $(a,b) \to a + 4b^2$ is a binary operation, compute $-5 \ast (2 \ast 0).$
cbse
class12
maths
ch1
sec-a
asked
Dec 20, 2016
by
priyanka.c
1
answer
A cooperative society of farmers has 50 hectors of land to grow two crops X and Y. The profit from crops X and Y are estimated on Rs.10,500 and Rs.9000 respectively. To control weeds, a liquid herbicide has to be used crops X and Y at rate of 20 litres and 10 litres per hectors. Further no more than 800 litres of herbicide should be used in order to protect fish and wild life using a pond which collects drainage from this land. How much land should be allocated to each crop so as to maximize the total profit of the society ?
cbse
class12
maths
ch1
sec-e
asked
Dec 12, 2016
by
priyanka.c
1
answer
Find the area bounded by the lines. $x +2y = 2, y = x +1$ and $2x +y= 7$
cbse
class12
maths
ch1
sec-e
asked
Dec 12, 2016
by
priyanka.c
1
answer
Find absolute maximum and minimum value a function given by $f(x) = 12x^{\frac{4}{3}} - 6x^{\frac{1}{3}} , x \in [-1,1]$
cbse
class12
maths
ch1
sec-c
asked
Dec 12, 2016
by
priyanka.c
1
answer
If $f : R \to R$ be given by $f(x) = (3-x^3)^{\frac{1}{3}}$, then evaluate $f o f(x)$
cbse
class12
maths
ch1
sec-a
asked
Dec 7, 2016
by
priyanka.c
1
answer
Define a binary operation $\ast$ on the set {0, 1, 2, 3, 4, 5} as \[a*b=\left \{ \begin{array} {1 1} a+b, & \quad \text{ if a+b<6} \\ a+b-6, & \quad { if a+b \geq 6} \end{array} \right.\] show that the zero is the identity for this operation and each element $a \neq 0$ of the set is invertible with $6-a$ being the inverse of $a$.
cbse
class12
maths
ch1
sec-c
asked
Nov 30, 2016
by
priyanka.c
1
answer
Let A = {1, 2}. Find the number of possible binary operations defined on A.
cbse
class12
maths
ch1
sec-b
asked
Nov 23, 2016
by
priyanka.c
1
answer
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