Home/Class 9/Science/

Question and Answer

In the following question, a statement of assertion is followed by a statement of reason.
Assertion (A): Gymnosperm are divided into monocots and dicots based on the number of cotyledons.
Reason (R): Cotyledons are also called seed leaves.
Mark the correct choice as:( )
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.

Answer

D
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play

Solution

Flowering plants have been divided into two major groups: the dicots and the monocots on the basis of number of cotyledons. For example, angiosperms. Gymnosperms are seed-bearing vascular plants, such as \(cycads\), \(ginkgo\) and \(conifers\) are not divided into monocots and dicots, and the ovules or seeds are not enclosed in an ovary. The number of cotyledons in the embryos of seeds of gymnosperms is highly variable, ranging from \(8-20\).
To Keep Reading This Solution, Download the APP
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Solution, Download the APP
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
Correct36
Incorrect0
Watch More Related Solutions
Which of the following cannot be the sides of a triangle?( )
A. \(3cm,4cm,5cm\)
B. \(2cm,4cm,6cm\)
C. \(2.5cm,3.5cm,4.5cm\)
D. \(2.3cm,6.4cm,5.2cm\)
\(11^{2}=121\) . What is the square root of \(121\)?
Account for the following observations. \(AlCl_{3}\) is a Lewis acid.
The following questions consist of two statements – Assertion (A) and Reason (R).
Assertion (A) : Amphibians have gills as well as lungs for respiration.
Reason (R) : Amphibians were the first animals to come out of water.
Mark the correct choice as:( )
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
The unit digit in the square of the number \(166\) is?( )
A. \(2\)
B. \(4\)
C. \(6\)
D. \(8\)
In which pair most efficient packing is present.
(a) HCP and BCC
(b) HCP and CCP
(c) BCC and CCP
(d) BCC and simple
\(14^2=196\). What is the square root of \(196?\)
Account for the following observations. Though fluorine is more electronegative than chlorine yet \(BF_{3}\) is weaker Lewis acid than\( BCl_3\).
Why are lone pair\(-\)lone pair repulsions stronger than the lone pair\(-\)bond pair repulsion?
The following questions consist of two statements — Assertion (A) and Reason (R).
Assertion (A) : \(Marsilea\) and ferns are referred to as cryptogams.
Reason (R) : Cryptogams have inconspicuous or hidden organs.
Mark the correct choice as: ( )
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.

Load More