Other names of secondary cortex,cork cambium and cork are

Periderm is produced from

An annual ring consists of .........

Dendrochronology is the study of

Select the correct statement$(s)$:
$(1)$ Lenticels are absent in woody climbers.
$(2)$ Lenticels are found in most woody trees.
$(3)$ Spring wood is lighter in color and has a lower density.
$(4)$ Sapwood is also known as duramen (heartwood).

Which of the following pairs is correct in the study of secondary growth?