In ancient times, people classified plants and animals by use. Like for plants they are being classified as beneficial or harmful. While for animals, they are classified as domestic animals, wild animals, creeping animals, flying animals, and sea animals.
Answer:
Organisms often preserved by carbonization include fish, leaves and the woody tissues of plants. permineralization or petrifaction takes place in porous materials such as bones, plants and shells
I believe there are 23 chromosomes in a human gamete.
Active transport. this is the only transfer of material that is again the concentration gradient, unlike diffusion or osmosis
Amino acids that are not synthesized in the body are called ESSENTIAL amino acids. These amino acids only can be obtained from the diet.
Proteins, lipids, and carbohydrates represent fundamental macronutrients.
Amino acids are the building blocks of proteins, which are linked together by peptide bonds.
Essential amino acids cannot be produced by the human body, thereby they only can be obtained from foods.
These essential amino acids include:
- Lysine
- Methionine
- Phenylalanine
- Histidine
- Isoleucine
- Leucine
- Threonine
- Tryptophan
- Valine
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