(D) In plants,the primary phloem is classified based on the time of its formation.The first formed primary phloem consists of narrow sieve tubes and i

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$A-$ protophloem; $B-$ metaphloem

(D) In plants,the primary phloem is classified based on the time of its formation.The first formed primary phloem consists of narrow sieve tubes and is referred to as protophloem.The later formed primary phloem,which typically has larger sieve tubes,is referred to as metaphloem.Therefore,the correct combination is $A-$ protophloem and $B-$ metaphloem.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

The first formed primary phloem is referred to as $A$. The later formed primary phloem is referred to as $B$.
Choose the correct combination of $A$ and $B$.

A
$A-$ protoxylem; $B-$ metaxylem
B
$A-$ protophloem; $B-$ sieve tube cells
C
$A-$ metaphloem; $B-$ sieve tube cells
D
$A-$ protophloem; $B-$ metaphloem

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The first formed primary phloem is referred to as $A$. The later formed primary phloem is referred to as $B$.Choose the correct combination of $A$ and $B$.

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The first formed primary phloem is referred to as $A$. The later formed primary phloem is referred to as $B$.
Choose the correct combination of $A$ and $B$.

Assertion $(A)$: $NaCl$ is less soluble in heavy water than in ordinary water.
Reason $(R)$: Dielectric constant of ordinary water is more than that of heavy water.
The correct answer is