Answer:
Mutation, Gene flow/Migration/Immigration of gene and Recombination
Explanation:
For any species there are majorly three sources of genetic variations –
a) Mutation – This leads to change in the genetic code with in the DNA of an organism. Sometimes mutation does not produce any effect on the organism. Mutation can produce both positive and negative impact. Its effect is observed in long run as its rate is slow.
b) Recombination – When an organism undergoes sex, his/her genes recombine with the genes of mating partner. The rate of recombination is faster than the rate of mutation
c) Gene flow /Migration/Immigration of gene – In this gene travel from one set of population to the other. The frequency of gene in the mixed population lies between the original population gene frequency and the migrated or donor population gene frequency
A germinating seed. This
is due to the fact that the cells of a germinating
seed are actively dividing as the plumule and radicle grow. This growth requires
energy and this is derived from cellular respiration of the stored food in the
cotyledons.
Answer:
The pairs of chromosomes become arranged on the metaphase plate.
Explanation:
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The answer is B.
It doesn’t really make sense and isn’t something an enzyme does. Enzymes help chemical reactions occur. They don’t alter the intrinsic energy of a particular substrate.
Answer:
Un grupo de evolucionistas moleculares de los Institutos Nacionales de la Salud (NIH, en Bethesda, Estados Unidos) acaba de concluir que LUCA, el organismo primitivo del que provienen todos los seres vivos actuales -sean microbios, gladiolos o seres humanos- era una bacteria de vida autónoma con 572 genes.
