Practice Questions

TLS Online TPP Program

#Question id: 4714

After the drought of 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of these events is now most likely to occur to finch beaks on this island?

#Unit 11. Evolution and Behavior

evolution of yet larger, deeper beaks over time, until all birds have relatively large, deep beaks
evolution of smaller, pointier beaks over time, until all birds have relatively small, pointy beaks
increased variation in beak size and shape over time
no change in beak size and shape over time

More Questions

#Question id: 5562

#Unit 5. Developmental Biology

In an egg cell treated with a chemical that binds calcium and magnesium ions, the ________.

#Question id: 23253

#Unit 13. Methods in Biology

#Question id: 351

#Unit 1. Molecules and their Interaction Relevant to Biology

If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.

#Question id: 11644

#Unit 7. System Physiology – Animal

Seven days after ovulation, pituitary secretion of luteinizing hormone (LH) decreases rapidly. What is the cause of this decrease in secretion?

#Question id: 33

#Unit 1. Molecules and their Interaction Relevant to Biology

Use the following figure to answer the question. The figure shows the structures of glucose and fructose. These two molecules differ in the