#Question id: 3255
#Unit 11. Evolution and Behavior
The body weight of offspring of bird species is range between 12 gm to 18 gm. In a laboratory experiment, species was subjected to selection pressure having influence on the offspring body weight. After many generations of experimental selection pressure, the body weight range between 16 gm to 24 gm. Which of the following natural selection operate on this species?
#Question id: 11115
#Unit 7. System Physiology – Animal
The nasal cavity is separated from the oral cavity by:
#Question id: 672
#Unit 1. Molecules and their Interaction Relevant to Biology
An ideal α-helix has a pitch of 0.54 nm and a rise of 0.15 nm. What is the length along the helix axis for a segment of an ideal α-helix that contains 30 amino acids?
#Question id: 4863
#Unit 8. Inheritance Biology
Two genes of a flower, one controlling blue (B) versus white (b) petals and the other controlling round (R) versus oval (r) stamens, are linked and are 10 map units apart. You cross a homozygous blue-oval plant with a homozygous white-round plant. The resulting F1 progeny are crossed with homozygous white-oval plants, and 1,000 F2 progeny are obtained. How many plants of each of the four phenotypes do you expect?
#Question id: 4358
#Unit 3. Fundamental Processes
Which of the following mechanisms is used to coordinate the expression of multiple, related genes in eukaryotic cells?