The plant that is present having various climatic condition shows different mode of activities cambium ring. If the season is spring the activity of cambium ring is more forming spring wood or early wood. And, if the climatic condition is not good i.e winter or autumn, the activity of cambium ring is less and form late wood. Because of which there forms different distinct ring with the addition of spring wood and autumn wood that is called annual ring. Each and every year one annual ring is...

All dicot and monocot plants are the examples of plants with conjoint and collateral vascular bundle.

Typical eg: helianthus , zea mays , pisum sativum. Etc

Functions of parenchyma :

1. Parenchymatous cells that contain chloroplasts are the main sites of photosynthesis.

2.It serves mainly for the storage of food material in the form of starches, proteins, oils and fats. The parenchymatous tissues in the root and stem tubers are its good examples.

3.In aquatic plants, parenchyma cells (aerenchyma) have lots of spaces that store air to keep them floating and facilitate exchange of gases

4.In fleshy stems and leaves, parenchyma cells store water e.g....