Which structure is common to both gymnosperms and angiosperms? 

#Question id: 11207

#Unit 7. System Physiology – Animal

In multiple sclerosis, the myelin sheaths around the axons of the brain and spinal cord are damaged and demyelination results. How does this disease manifest at the level of the action potential?

 I) Action potentials move in the opposite direction on the axon.

 II) Action potentials move more slowly along the axon.

 III) No action potentials are transmitted.

#Question id: 24510

#Unit 10. Ecological Principles

Polyphagous parasites, usually complete their life cycle at least two different host species but  not reproduce on their  host, known as;

#Question id: 9164

#Unit 9. Diversity of Life Forms

Use the following figures to answer the question below.

East of the Mississippi River, in Hopkinsville Kentucky, the mean annual precipitation is 130 cm. The mean annual temperature is 14.3°C. In the winter, the mean temperature is 7.3°C, while in summer it is 20.6°C. Using the climograph shown here, how would we classify the biome found in Hopkinsville?

#Question id: 14855

#Unit 13. Methods in Biology

For a Binomial distribution, the mean is 6 and the standard deviation is 2 . The Binomial distribution is 

#Question id: 46

#Unit 1. Molecules and their Interaction Relevant to Biology

The three-dimensional structure of a protein is determined primarily by: