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TLS Online TPP Program

#Question id: 9230

Brown-headed cowbirds utilize fragmented forests effectively by ________.

#Unit 9. Diversity of Life Forms
  1. feeding on the fruits of shrubs that tend to grow at the forest/open-field interface
  2. parasitizing the nests of forest birds and feeding on open-field insects
  3. consuming the eggs of other species as well as insects and seeds in open fields
  4. outcompeting other songbird species for access to nesting holes in old-growth trees 
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TLS Online TPP Program

#Question id: 10925

#Unit 7. System Physiology – Animal

During the second trimester of pregnancy, where is the predominant site of red blood cell production?
TLS Online TPP Program

#Question id: 191

#Unit 1. Molecules and their Interaction Relevant to Biology

The role of zinc in the mechanisms of carbonic anhydrase is to
TLS Online TPP Program

#Question id: 11671

#Unit 7. System Physiology – Animal

Which process in the nephron is least selective?
TLS Online TPP Program

#Question id: 7113

#Unit 5. Developmental Biology

In flies, frogs, and chicks, gradients of morphogens determine the future antero-posterior and dorso-ventral axes of the developing embryo. How is the antero-posterior axis determined in C. elegans?
TLS Online TPP Program

#Question id: 5429

#Unit 8. Inheritance Biology

Assume that three loci, each with two alleles (A and a, B and b, C and c), determine the differences in height between two homozygous strains of a plant. These genes are additive and equal in their effects on plant height. One strain (aabbcc) is 10 cm in height. The other strain (AABBCC) is 22 cm in height. The two strains are crossed, and the resulting F1 are interbred to produce 1000 F2 progeny. what is number of F2 progeny having intermediate height?