The vertebrate brain and spinal cord start their development as a flat plate of neuroepithelial cells that folds up along most of its length to form a tube. The process of forming this neural tube is called neurulation. Which of the following signals play important role in both neurulation and cell fate patterning of neural tube?

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#Question id: 19100

#Unit 6. System Physiology – Plant

Xanthomonas oryzae secretes a highly conserved peptide, which mediates quorum sensing by

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#Question id: 23695

#Unit 13. Methods in Biology

Yeast artificial chromosomes contain which of the following elements?

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#Question id: 10429

#Unit 6. System Physiology – Plant

Which of the following given statements about PHYA is incorrect?

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#Question id: 3584

#Unit 8. Inheritance Biology

In a plant species, a segregating line (RR- Red, Rr- Pink and rr- white) that contains both homozygotes and heterozygotes at a locus can be made homozygous by repeated selfing for several generations. What is the proportional red flower in third generations of selfing, if the level of heterozygosity in generation '0' is denoted as 1?

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#Question id: 12533

#Unit 10. Ecological Principles

If the flow of energy in an arctic ecosystem goes through a simple food chain, perhaps involving humans, starts from seaweeds to fish to seals to polar bears, then which of the following could be true?