Answer:
When an acid reacts with a metal it results in the formation of salt and hydrogen gas is liberated. For example, the nitric acid reacts with the calcium it forms salts of calcium nitrate and hydrogen gas is liberated.
Answer:
I think that you meant autotroph, but the answer is producer
Explanation: the definition of autotroph is "an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide."
Answer: Autotrophs are any organisms that are capable of producing their own food. For most, this is achieved by using light energy, water and carbon dioxide.
Producer is the answer.
b. They all include only nonliving components of an ecosystem.
c. They are all essential for sustaining life on Earth.
d. They all include only living components of an ecosystem.
Answer:
c
Explanation:
Answer:
In the α helix structure, there is a hydrogen bonding between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain
Explanation:
The common secondary structure of protein are: α helix and β pleated sheet
α helix is a rod like structure.It is a right handed coil of amino acid residue on a polypeptide chain, which may be 4 units or 40 units long. The coil is held together by hydrogen bond between oxygen atom in a carbonyl of one amino acid and the hydrogen atom of the amino group that is situated four residues farther along the polypeptide chain. This means that every complete turn of the helix is only 3.6 residues.
In an alpha helix, hydrogen bonds are formed between the carbonyl oxygen of one amino acid and the hydrogen attached to the nitrogen atom of another amino acid that is four residues away in the same polypeptide chain. This results in the characteristic spiral structure of an alpha helix.
In an alpha helix, a type of secondary structure in proteins, there is a specific pattern of hydrogen bonding that helps maintain its spiral shape. The hydrogen bond is formed between the carbonyl oxygen (C=O) of one amino acid and the hydrogen (H) attached to the nitrogen atom (N-H) of another amino acid that is four residues away in the same polypeptide chain. This repeated pattern of hydrogen bonding results in the characteristic spiral structure of the alpha helix. In terms of polypeptide numbering, if the amino acid at position n in the chain forms a hydrogen bond, then it does so with the amino acid at position n+4. This bonding pattern, along with the characteristics of the specific amino acids involved, contributes to the overall stability and function of the protein.
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there made in the cells ribosomes
b. Natural selection does not cause a species to change.
c. Natural selection is the only cause of changes in a species.
d. Natural selection usually causes a species to change gradually. please i beg help me 18 points if you help
Natural selection is a one of the basic mechanisms of evolution by which species adapt to their environment in order to increase their chance of survival and reproduction. It is the change in the characteristics that lead to survival. In natural selection, genotype variations that will increase the chance of survival and reproduction of some organism are preserved and will be inherited. So, natural selection will "select" those genotypes that help survival causing gradual change of species.