For more than half the earth’s history nothing living existed upon any part of the globe. That means, for millions of years the surface of our planet was nothing but bare rocks, without soil or sand, swept by hot winds exceeding in violence the wildest tornadoes, of today. It was drenched by torrential downpours of tropical rain, which gradually tore away the surface to form sandy sediments at the bottom of the seas.
According to the theories of science, there was a time when there were no plants on earth. Then, hundreds of millions of years later, tiny specks of protoplasm appeared on the earth. Protoplasm is the name for the living material that is found in both plants and animals. these original specks of protoplasm, according to this theory, were the beginnings of all our plants and animals.
The protoplasm specks that became plants developed thick walls and settled down to staying in one place. They also developed a kind of green colouring matter known as “chlorophyll”. this enabled them to make food from substances in the air, water and soil.
These early green plants had only one cell, but they later formed groups of cells. Since they had no protection against drying out, they had to stay in the water. Today, some descendants of these original plants still survive, though they have changed quite a bit. We call them “algae”.
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One group of plants that developed obtained their food without the use of chlorophyll. these non-green plants are the “fungi”.
Most of the plants on earth today evolve from the algae. Some of them came out of the sea and developed rootlets which could anchor them in the soil. They also developed little leaves with an outer skin covering, as protection against drying. these plants became mosses and ferns.
All the earliest plants are reproduced either by simple cell division or by means of spores. Spores are little dust-like cells something like seeds, but containing no stored food in them as seeds do. As time went on, some of these plants developed flowers that produced true seeds.
Two different types of plants with seeds appeared; those with naked seeds and those with protected seeds. Each of these two types later developed along many different lines.
Plants have “factories” to manufacture their food, and these factories are the leaves.
According to the theories of science, there was a time when there were no plants on earth. Then, hundreds of millions of years later, tiny specks of protoplasm appeared on the earth. Protoplasm is the name for the living material that is found in both plants and animals. these original specks of protoplasm, according to this theory, were the beginnings of all our plants and animals.
The protoplasm specks that became plants developed thick walls and settled down to staying in one place. They also developed a kind of green colouring matter known as “chlorophyll”. this enabled them to make food from substances in the air, water and soil.
These early green plants had only one cell, but they later formed groups of cells. Since they had no protection against drying out, they had to stay in the water. Today, some descendants of these original plants still survive, though they have changed quite a bit. We call them “algae”.
Most of the plants on earth today evolve from the algae. Some of them came out of the sea and developed rootlets which could anchor them in the soil. They also developed little leaves with an outer skin covering, as protection against drying. these plants became mosses and ferns.
All the earliest plants are reproduced either by simple cell division or by means of spores. Spores are little dust-like cells something like seeds, but containing no stored food in them as seeds do. As time went on, some of these plants developed flowers that produced true seeds.
Two different types of plants with seeds appeared; those with naked seeds and those with protected seeds. Each of these two types later developed along many different lines.
Plants have “factories” to manufacture their food, and these factories are the leaves.
didn't god create the life of amimals and plants ?
ReplyDeletehow do you know that plants came back then when you weren't even born then huuu ? are you immortal ?
ReplyDelete