The answer is <span>C) Species are populations that interbreed and produce fertile offspring</span>
Species is a group of similar organisms able to reproduce (to exchange genes and interbreed) only within the group and produce fertile offspring. That means that organisms from different species could not exchange genes. Even if they do in some cases, there are pre- and postzygotic mechanisms which prevent having them fertile offspring.
The Answer Is Cell Walls And Proteins!
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Barbara has dominant alleles for curly hair because CC is all capitals. and <span> The two alleles of the gene are homozygous dominant</span>
Answer:
The cow is a Primary Consumer since it feeds off the Grass.
The grass is a Producer since it's an autotroph (Can make its food through Photo synthesies. )
The Mushroom is a decomposer since it's a fungus.
And lastly, the man would be a Tertiary consumer since most of us are omnivores.
Protein structure is the three-dimensional arrangement of atoms in a protein molecule. Proteins are polymers — specifically polypeptides — formed from sequences of amino acids, the monomers of the polymer. A single amino acid monomer may also be called a residue (chemistry) indicating a repeating unit of a polymer. Proteins form by amino acids undergoing condensation reactions, in which the amino acids lose one water molecule per reaction in order to attach to one another with a peptide bond. By convention, a chain under 30 amino acids is often identified as a peptide, rather than a protein.[1] To be able to perform their biological function, proteins fold into one or more specific spatial conformations driven by a number of non-covalent interactions such as hydrogen bonding, ionic interactions, Van der Waals forces, and hydrophobic packing. To understand the functions of proteins at a molecular level, it is often necessary to determine their three-dimensional structure. This is the topic of the scientific field of structural biology, which employs techniques such as X-ray crystallography, NMR spectroscopy, and dual polarisation interferometry to determine the structure of proteins.
Protein structures range in size from tens to several thousand amino acids.[2] By physical size, proteins are classified as nanoparticles, between 1–100 nm. Very large aggregates can be formed from protein subunits. For example, many thousands of actin molecules assemble into a microfilament.
A protein may undergo reversible structural changes in performing its biological function. The alternative structures of the same protein are referred to as different conformational isomers, or simply, conformations, and transitions between them are called conformational changes.
