This is from wikipedia
In general, it is accepted that there are five major classes of plant hormones, some of which are made up of many different chemicals that can vary in structure from one plant to the next.
The chemicals are each grouped together into one of these classes based on their structural similarities and on their effects on plant physiology. (following this is a list of the five major classes)
Other plant hormones and growth regulators are not easily grouped into these classes; they exist naturally or are synthesized by humans or other organisms, including chemicals that inhibit plant growth or interrupt the physiological processes within plants. Each class has positive as well as inhibitory functions, and most often work in tandem with each other, with varying ratios of one or more interplaying to affect growth regulation.
(I highlighted the word many and added sentence in brackets)
Yes many plant hormones are secreted by plants internally. Such as auxin, gibbrailin, cytokinin etc.
Hormones are made by endocrine glands, of which there are many.
Many plants can live inside. Here are some examples: Ferns Banzai
If human body have hormones, same true with plants and this plant hormones called auxin. It is a substance naturally produced in actively growing parts of plants that regulate many aspects of plant growth and development.
These hormones stimulate the secretion of other hormones. Many hormones of hypothalamus are topic hormones.
You should find that many of your hormones are made from cholesterol. Have some research!
The plant growth hormone Auxin is controlled by circadian rhythms within the plant. The discovery explains how plants can time their growth to take advantage of resources such as light and water, and suggests that many other processes may be influenced by circadian rhythms.
Yes also,because there are so many present inside, it what makes it green.
Yes, there are many hormones in it!
the cell wall of a plant cell is made up of many different things like sugars and cellulose. It can be made up of many different things though.
I didn't quite get your question, but I'll try my best to answer. Plants grow because of a little sprout inside of the seed that continues to grow by eating the food provided inside of the seed.
The tea plant, although tea can be made out of many other plants.