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they absorb their nourishment through the placenta, (which is formed by the interlocking of fetal and maternal tissues). Gradually growing and attaining proper dimensions, they come forth from the womb. As long as they are infants they are nourished by their mothers' milk and fat; but when they grow up they ingest boiled rice and gruel and both mobile and immobile organisms.” This also applies with minor variation to the vertebrate sub-human animals.
? In Biology, organisms are divided into two kinds:
1. AUTOTROPHS- Organisms capable of living and growing by manufacturing all its food from inorganic compounds. A green plant is autotrophic because the only compound it needs are carbon dioxide, oxygen, water and various mineral salts. Such an organism will also need a supply of energy which can come from sunlight (PHOTOTROPHISM) or breakdown of inorganic compounds (CHEMOTROPHISM, i.e., obtaining energy by oxidation of inorganic compounds. When applied to an autotroph the organism is said to be chemoautotrophic or chemosynthetic).
Photosynthesis Formation within the green plant CHLOROPLAST—solid body inside plant cell which contains chlorophyll; sight of photosynthesis or other pigment system in some algae and bacterial) of organic nutriment (food) in the form of carbohydrate by combination of energy from sunlight and carbon dioxide from air. Oxygen is eliminated during the combination.
2. HETEROTROPHS — Organisms dependent for food on other organisms, living or dead.
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