A 72-year-old man had surgery to remove an abdominal tumor. Pathohistologic studies reveal that the tumor mass contains a large number of blood vessels. An increase in which of the following is the most likely stimulus for the growth of vessels in a solid tumor?

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#Question id: 3454

#Unit 11. Evolution and Behavior

Altruism is favoured when rb - c > 0 where c is fitness cost to altruist, b is fitness benefit to recipient; and r is genetic relatedness. It is under negative selection when

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#Question id: 15703

#Unit 12. Applied Biology

Most commonly used carbon source in nutrient medium for plant tissue culture is

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#Question id: 3478

#Unit 11. Evolution and Behavior

Natural selection may favour the evolution of foraging behaviours by predator that

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#Question id: 806

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which characteristic does this double-stranded molecule have when it forms a B-DNA structure?

TLS Online TPP Program

#Question id: 9226

#Unit 9. Diversity of Life Forms

The main purpose of movement corridors is to ________.