AAmino acids are organic compounds that contain amine and carboxyl functional groups, along with a side chain specific to each amino acid. The key elements of an amino acid are carbon, hydrogen, oxygen, and nitrogen, although other elements are found in the side chains of certain amino acids
Explanation:
Answer:
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D. is the answer because soil and rocks are not living things
Answer:
3,4, 5 and 6
Explanation:
There are four essential credits of natural selection –
a) Heredity – The genetic characteristics of an offspring are acquired by his/her parents. Parents while mating pass on the desirable of advantageous traits to their offspring for natural selection to act. Natural selection leads to variation and further changes in the advantageous traits based on the varying external and internal conditions.
b) Reproduction – Reproduction is very essential for natural selection or else the gene flow will stop. The larger is the gene flow, the larger is the gene pool thereby paving way for higher variations through natural selection
c) Variation in fitness – Not all species are fit to survive. Some have higher abilities to cope up with competitive pressure while some cannot cope up with the pressure of competition and hence die.
d) Variation in characteristics – Natural selection brings about changes in the genotype and phenotype of offspring. No two individuals are exactly similar. Variations is essential for progression of evolution.
Hence, option 3,4,5 and 6 are correct