#Question id: 24512
#Unit 10. Ecological Principles
#Question id: 1797
#Unit 4. Cell Communication and Cell Signaling
The stress induced by severe exercise can increase susceptibility to infection by:
#Question id: 11553
#Unit 7. System Physiology – Animal
Tadpoles must undergo a major metamorphosis to become frogs. This change includes reabsorption of the tail, growth of limbs, calcification of the skeleton, increase in rhodopsin in the eye, development of lungs, change in hemoglobin structure, and reformation of the gut from the long gut of an herbivore to the short gut of a carnivore. Amazingly, all of these changes are induced by thyroxine. What is the most likely explanation for such a wide array of effects of thyroxine?
#Question id: 933
#Unit 1. Molecules and their Interaction Relevant to Biology
Industrially, nitrogen for use in fertilizers is converted to ammonia by ________.
#Question id: 5566
#Unit 5. Developmental Biology
In some rare salamander species, all individuals are females. Reproduction relies on those females having access to sperm from males of another species. However, the resulting embryos receive no genetic contribution from the males. Why do you think sperm are necessary for reproduction?