Answer: 4
Explanation:
A monomer is a small molecular mass molecule that is attached to other monomers, sometimes hundreds or thousands, by chemical bonds, usually covalent, forming macromolecules called polymers. Polymerization is the process of covalent bonding of the smallest monomers to the polymer. During polymerization, chemical groups are lost from the monomers so that they can bond. Examples are:
- Amino acids are the monomers of proteins.
- Nucleotides are the monomers of nucleic acids.
- Monosaccharides are the monomers of polysaccharides.
- Lipid monomers are the monomers of fatty acids
In this case, if we have the A and B monomers, the combinations can be A attached to A, A attached to B, B attached to B and B attached to A. This gives us a total of 4 different polymers.
1. mRNA attaches to the ribosome.
2. tRNA's attach to free amino acids in the cytoplasmic "pool" of amino acids.
3. tRNA carries its specific amino acid to the ribosome.
4. tRNA "delivers" its amino acid based on complementary pairing of a triplet code (anticodon) with the triplet code (codon) of the mRNA.
5. Enzyme "hooks" the amino acid to the last one in the chain forming a peptide bond.
6. Protein chain continues to grow as each tRNA brings in its amino acid and adds it to the chain.
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The answer is pronuclei. A pronuclei is the state of the
nucleus of either the sperm or the ovum after the sperm has entered the ovum
but the two nuclei have not yet fused. When the sperm enters the ovum, the membrane
of the sperm pronuclei dissolves hence leaving no barrier for the two genetic
materials to combine.
A phylogenetic tree<span> or evolutionary </span>tree<span> is a branching diagram or "</span>tree<span>" showing the inferred evolutionary relationships among various biological species or other entities—their </span>phylogeny<span>—based upon similarities and differences in their physical or genetic characteristics.</span>
Answer:
A number of human activities can impact on the water cycle: damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels
Explanation: