How can a large amount of biological diversity protect an ecosystem from environmental damage? Why are less biodiverse ecosystems at risk of suffering serious biological harm if subject to even small changes?

How does the vegetal stratification of an ecosystem influence its biological diversity?

How does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?

Sympathetic nervous system induces

(a) secretion of digestive juices

(b) heart beat

(c) secretion of saliva

(d) all of these.

Describe how the information about the Gpr56 gene (see article below) could be used to develop new treatments for myelin sheath disorders like multiple sclerosis in humans.

https://source.wustl.edu/2015/01/scientists-find-gene-vital-to-central-nervous-system-development/​

Please include all citations.

Share your thoughts with your peers about how Sonic hedgehog specifies the sclerotome. Include all citations

A patient is in the hospital with bacterial meningitis. The doctor needs to determine whether the patient has an infection with Neisseria meningitis or Haemophilus influenzae.

1. What is the problem (scenario) that you're asked to solve?

2. What is your hypothesis for the solution to the problem? What organism do you think caused the problem?

3. What are the experiments that are required to answer your hypothesis? (The stains, biochemical, and media for each organism and the expected results)

4. What is your conclusion to the problem? Based on the expected results, what organism caused the problem?

What life history factors influence lambda?

vitamine D play important role in calcium reabsorption

1. Which of the following DOES NOT influence the conduction velocity of an action potential

2. The relationship of an action potential (AP) to the stimulus that generates it is best described as:

Compare and contrast sexual and asexual reproduction. Explain relevance to evolution. Be descriptive on each and every similarity and difference.

Compare and contrast active and passive transport. Discuss the different forms and how they function. Be descriptive on each and every similarity and difference.  

Discuss the endosymbiosis theory. Analyze the evidence that supports the theory, and the problems that refute the theory. Please be at least 7 sentences and include all the main points.

Compare and contrast photosystem 1 and photosystem 2. Please be at least 7 sentences and be descriptive about each and every difference and similarity.