Tomato (or tomato, as it is historically known) has many varieties. Despite the huge number of years, during which it is grown all around the world, there is still no definite opinion about its definition. ...
Now, many gardeners are looking forward to the turn of the summer season, which this year is a little late because of the weather. Planting of many plants in the country is delayed by 2-3 weeks. Indeed, ...
One of the most elegant and at the same time spectacular colors can be called Dahlia. Since ancient times, this plant has attracted the attention of mankind, and for a time was considered really the king, it was ...
In our world, there is so much more interesting and unusual. It happens, just watch and wonder. What if this extraordinary miracle is still tasty and healthy? Let’s look at the fruit, which is difficult to ...
Pteridophytes: 1. The life cycle shows distinct heteromorphic alternation of generation. 2. Plant body of Sporophyte is dominant phase. 3. Sporophyte is differentiated into ...
This division includes club mosses, horsetails and ferns. The oldest known pteridophytes are fossils from the end of the silurian period, 380 million years ago. Pteridophyta constitutes the earliest known vascular plants. ...
There are fossil records of blue green algae (Cyanobacteria) living 3000 million years ago and many eukaryotic organisms have existed for more than 1000 million years. However the first organisms to colonize the land, primitive plants ...
In Algae the plant body shows no differentiation into root, stem or leaf or true tissues. Such a plant body is called thallus. They do not have vascular tissues. The sex organs of this group of ...
Diversity in living organisms There is a great diversity among living organisms found on the planet earth. They differ in their structure, habit, habitat, mode of nutrition, and physiology. The ...
This is also called as cohesion-tension theory put forward by Dixon and Joly (1894) and supported by Renner, Curtis and Clark. This theory is based on a number of features. Cohesion and Adhesion...