The correct options are as follows: 24. THEY SUPPLY CELL WITH NITROGEN. Lipid is one of the classes of food that are very essential for humans' health. There are different types of lipids and they have a lot of vital roles which they play in the human system. The functions of lipids include the following: they form a structural part of the cell membranes, they provide cells with energy, they carry fat soluble vitamins to the body cells, they keep the body warm, they serve as shock absorber to some organs in the body, etc. Lipids do not supply the body cells with nitrogen.
25. CELLULOSE. There are different types of carbohydrate, some are found in animals only, some are found in plants only while some are found in both plants and animals. Cellulose is a type of carbohydrate that is found only in plants. Paper is usually made from wood pulp, which is derived from plants, thus the type of carbohydrate found in paper is cellulose.
26. PROTEINS. Protein is one of the classes of food, which are very essential for human health. We have basically twenty different types of proteins and these proteins are formed from amino acids.Some of the proteins are described as non essential because we do not need to consume them in our food, they are already present in adequate amount in our bodies. Some are describe as essential because we need to eat them in our food. Proteins are the ones that are responsible for building new tissues and repairing injured ones. They also serves as enzymes, which speed up the rate of biochemical reactions in our bodies.
27. THEY HELP BRING ABOUT CHEMICAL REACTIONS Enzymes are biological catalysts which speed up the rate of biochemical reactions in our body. Each biochemical reaction has its own specific enzymes. Without enzymes the body will not be able to digest eaten food in record time and this will lead to cell death and the eventual death of the concerned organism.
28. HYDROGEN BOND DNA belongs to the class of nucleic acids, nucleic acids are made up of many nucleotide which are joined together. A nucleotide is made up of phosphate, nitrogenous bases and a five carbon sugar molecule. A strand of DNA is made up of nucleotides that are joined together by phosphodiester bonds. A DNA molecule is made up of two strands of nucleotides that are twisted to form a double helix, it is the hydrogen bonds that hold the two strands together.
29. STARCH. Plastids refers to the small organelles that are found inside the plant cytoplasm which contains food molecules. Plants typically store starch molecules inside the plastids. This is because, the food molecules that are manufactured by plants through photosynthesis are normally store in plants in form of starch. Animals and humans use this starch as food in order to produce energy for body use.
30. IT HAS ALL NINE OF THE ESSENTIAL AMINO ACIDS. As I mentioned earlier, there are some amino acids which are considered to be essential proteins, we must consume these proteins in our foods because our bodies can not synthesize them. The protein are nine in number and they are: valine, tryptophan, phenylalanine, threonine, methionine, leucine, isoleucine, lysine and histidine. A complete protein is a protein that consist of all these nine proteins.
The answer requires looking at the meaning of the words 'theory' and 'law'. The formal definition of a theory is that it is a comprehensive explanation of a observed phenomenon supported by a lot of evidence. Law is a fact that is bound to be true in nature, example Newton's second law. However, a theory is subjected to continuous refinements based on the several new findings that happen with time. These refinements make the theory appear incomplete. As with the theory of evolution, a lot of research work is being put to understand the complex phenomenon of genetic inheritance of traits of behaviour. Unless there are evidences from nature for all the aspects of evolution in theory, it'll remain a theory and not become a law.
Answer is A) Yes, if scientists decide that enough evidence supports the theory.
Solar eclipses result from the Moon blocking the Sun relative to the Earth; thus Earth, Moon and Sun all lie on a line. Lunar eclipses work the same way in a different order: Moon, Earth and Sun all on a line. In this case the Earth's shadow hides the Moon from view.
Chemical cycling illustrates the systems of concurrent circulation of elements between other states, compounds, and substances, and then return to their original state, which takes place in space, and on many objects in space comprising the Earth.
Chemical cycling of the nutrients (inorganic) is needed to maintain the conservation of nutrients on Earth. The chemical cycling of nutrients in a natural system requires a pool for the elements, the activities done by human beings, the biotic community and its food chains, and an exchange pool from which producers extract their nutrients. All the mentioned factors are associated with affecting a chemical cycling in exception to the input of geothermal energy.
