Answer:
Autotrphic means that the organism can produce their own food through photosynthesis.
Were preserved remains of ancient organisms
Explanation:
The Precambrian covers almost 90% of the entire history of the Earth. It has been divided into three eras: the Hadean, the Archean and the Proterozoic. The Precambrian Era comprises all of geologic time prior to 600 million years ago.
<span>These are some distinguished areas in ecosystems that help the humans immensely. Floodplain is area that lies low and is subjected to floods in regular periods making it reduce intensity of floods and improving the stability of the soil. This also improves water quality and ground water making the ecosystem suitable for flora and fauna. Meander unlike floodplain is a broad valley like which is with time develops with bends and helps the ecosystem by reducing the speed of river flow. Delta is the region that is formed around the vast water bodies because of the water flow or the lack of it. It helps the ecosystem by giving protection from natural calamities like floods and hurricanes.</span>
Answer:
The correct answer is a. hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond.
Explanation:
The secondary structure of proteins are formed by α-helices and β-structures, that can be supported by hydrogen bonds between amine hydrogens and another peptide bond.
