1.The difference between shrub and trees -
Trees and shrubs are plants that have woody growth. Many people, for example, think that banana trees are trees, but in fact they are not; they are considered to be the world's largest herb. Only plants with woody parts are trees and shrubs.
Once you know that it has woody growth, you can determine whether it is a tree or a shrub. The generally acknowledged definition of a tree, according to USU, is a "woody plant having one erect perennial stem (trunk) at least three inches in diameter at a point 4-1/2 feet above the ground, a definitely formed crown of foliage, and a mature height of at least 13 feet."
Shrubs, therefore, are the opposite : a "woody plant with several perennial stems that may be erect or may lay close to the ground. It will usually have a height less than 13 feet and stems no more than about three inches in diameter."
2.The difference between shrub and herbs -
A shrub has many stems and may grow in a height of up to five to six metres. The places where they grow are referred to as a shrubbery. They can be grown either in parks or gardens. They have small branches with leaves on them and these branches grow close to each other. They can be ever green or deciduous. Few examples of shrubs include mountain pine and common juniper. If the shrubs are small, then they are called as sub-shrubs and few examples of these sub-shrubs include periwinkle, thyme and lavender.
Herbs are also plants, but they have a specific purpose. It can be used for medicinal purpose. They are mostly known for their smell, which is pleasant and amazing. They can be used for spiritual purpose as well. The fragrance of these herbs makes it valuable for many purposes, like medicinal and spiritual. All the parts, like the roots, flowers, leaves, seeds are considered herbs. The examples of herbs are rosemary, bay laurel, Christianity myrrh, basil and frankincense. Herbs can be grown in containers, beds and borders. When they are grown with other variety, it adds on to the beauty of the herb.
3.The difference between warm blooded and cold blooded animals -
Warm blooded animals generate their own heat through their metabolism.
Cold blooded animals need warmth of the environment to bring their bodily temperature to normal temp.
The main difference between a cold-blooded animal and a warmblooded one is that the warmblooded one has a physiology that includes mechanisms that heat and keep the body warm. The cold-blooded animal lacks these things and its body temperature will change in response to the weather (hot sun, snow) and what the animal can do to avoid the effects of that weather (like a lizard sunning on a rock early in the moring or hiding in the shade at noon).
Warm blooded animals have a constant temperature, and can live in cold temperatures. Cold blooded animal's blood temperature depends on their environment's temperature.
4.The difference between annuals and biennials -
Annual plants are so called because they have a one year life cycle. An annual plant life cycle may happen in any duration under a year, with some annual plants having a life cycle of just a few weeks.
Perennials may have a few years of life cycle. Some perennial plants have a life cycle of 20 years, depending upon the species of plant.
