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In a follow up to Alfred Sturtevant's studies on recombination in the fruit fly, Seymour Benzer used complementation studies of bacteriophage mutants to verify where recombination happens along a chromosome. Which of the following best explains his conclusions?
A. A gene is an indivisible unit thus recombination occurs among neighboring genes
B. Recombination happens at the level of the nucleotide and can therefore occur within a gene itself
C. The process of recombination is restricted to the centromere of each chromosome thus entire arms are smallest units that are exchanged during crossing over.
D. Recombination is limited to the exchange of material among the nuclear genome and the mitochondrial genome.
Plants use proteins, lipids and starch as seed storage compounds. What is an advantage of using proteins as a storage compound that are not afforded by lipids or starch?
EXCRETION IN PRAWN- A pair of antennary gland or green gland and a median renal sac present. Green glands lie at the base of antennae & open out by renal aperture.
examples of gametes
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