Shell coiling of the snail Limnaea peregra(genetic maternal effect)  the shell coils (s+s+) which is termed dextral coiling, while some snails exhibiting sinistral coiling (ss). The allele for dextral (s +) is dominant over the allele for sinistral (s). If a male homozygous for dextral alleles (s+s+) is crossed with a female homozygous for sinistral alleles (ss) all of the F1 are heterozygous (s+s) and have a sinistral shell. If these F1 snails are self-fertilized, what is the phenotype of the F2 snail?

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#Question id: 12103

#Unit 10. Ecological Principles

Which of the following is a good description of an ecological niche? 

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#Question id: 23526

#General Aptitude

An ecological community is an assemblage of

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#Question id: 7304

#Unit 5. Developmental Biology

Which one of the following will be observed when auxin to cytokinin ratio is increased in the culture medium during organogenesis from tobacco pith callus?

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#Question id: 11128

#Unit 7. System Physiology – Animal

Inhibition of pain signals by tactile stimulation of a skin surface involves which of the following selections?

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#Question id: 10678

#Unit 10. Ecological Principles

In competitive species N1 and N2, four individuals of N2 use the same resource as one individuals of N1. According conversion factor, what is the value of per capita competitive effect of N2 on N1(α) and per capita effect of N1 on N2 ( β) respectively?