$A$ : Oldest layer of sapwood lies just outside vascular cambium.
$R$ : Sapwood contains actively conducting vessels and occupies central part of stem.
$A$ : Oldest layer of sapwood lies just outside vascular cambium.
$R$ : Sapwood contains actively conducting vessels and occupies central part of stem.
- A
Assertion and Reason both are correct and also correct explanation.
- B
Assertion and Reason both are correct but not explanation of assertion.
- C
Assertion is correct, but Reason is incorrect.
- D
Both Assertion and Reason are incorrect.
Similar Questions
Each of the following terms has some anatomical significance. What do these terms mean ? Explain with the help of line diagrams.
$(A)$ Plasmadesmoses / Plasmodesmata
$(B)$ Middle lamella
$(C)$ Secondary wall
Each of the following terms has some anatomical significance. What do these terms mean ? Explain with the help of line diagrams.
$(A)$ Plasmadesmoses / Plasmodesmata
$(B)$ Middle lamella
$(C)$ Secondary wall
Desert grasses often roll their leaves due to presence of
Desert grasses often roll their leaves due to presence of
Assertion: Cambium is a lateral meristem and cause growth in width.
Reason: Cambium is made up of fusiform and ray initials in stem.
Assertion: Cambium is a lateral meristem and cause growth in width.
Reason: Cambium is made up of fusiform and ray initials in stem.
- [AIIMS 1998]
Tissue present in an annual ring is
Tissue present in an annual ring is
$A$ : Bark is all the tissue outside steler cambium.
$R$ : Bark is formed due to the activity of phellogen only.
$A$ : Bark is all the tissue outside steler cambium.
$R$ : Bark is formed due to the activity of phellogen only.