ডিম্বাণুর দিকে পরাগ নলের বৃদ্ধি একটি উদাহরণ: (A) Geotropism B Chemotropism (C) P...

What is the stimulus in: (a) phototropism? (b) geotropism? (c) chemotropism? (d) hydrotropism? (e) thigmotropism?

(a) Define geotropism. Give one example of geotropism. (b) What is meant by 'positive geotropism' and negative geotropism? Give one example of each type. Draw a labelled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shown negative geotropism. (c) Name one plant part which exhibits positive thigmotropism.

In A B C , P and Q are points on sides A B and A C respectively such that P Q B C . If A P=4c m ,\ \ P B=6c m and P Q=3c m , determine B C .

In A B C , P divides the side A B such that A P : P B=1:2 . Q is a point in A C such that P Q B C . Find the ratio of the areas of A P Q and trapezium B P Q C .

If A, B, C are independent events such that P(Acap B) = 1/2, P(Bcap C) = 1/3 and P(C cap A) = 1/6, then respective values of P(A), P(B) and P(C) are

B O and C O are respectively the bisectors of /_B and /_C of A B C . A O produced meets B C at P . Show that: (A B)/(B P)=(A O)/(O P) (ii) (A C)/(C P)=(A O)/(O P) (iii) (A B)/(A C)=(B P)/(P C) (iv) A P is the bisector of /_B A C .

In Figure, P is a point in the interior of a parallelogram A B C D . Show that a r( A P B)+a r( P C D)=1/2a r(^(gm)A B C D) a R(A P D)+a r( P B C)=a r( A P B)+a r( P C D)

In Figure, P is a point in the interior of a parallelogram A B C Ddot Show that a r( A P B)+a r( P C D)=1/2a r\ (|""|^(gm)A B C D) a r\ ( A P D)+a r\ ( P B C)=a r\ ( A P B)+a r( P C D)

(a times b times c)^(p)=a^(p)times b^(p)times c^(p)

Let A, B and C be three events such that P(C )=0 Statement-1: P(A cap B cap C)=0 Statement-2: P(A cup B cup C)=P(A cup B)