#Question id: 10899
#Unit 6. System Physiology – Plant
Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;
#Question id: 10987
#Unit 7. System Physiology – Animal
If the ventricular Purkinje fibers become the pacemaker of the heart, what is the expected heart rate?
#Question id: 4591
#Unit 11. Evolution and Behavior
Which of the following factors could cause a surge in population size?
#Question id: 8964
#Unit 9. Diversity of Life Forms
#Question id: 23249
#Unit 13. Methods in Biology