Morphogens can be:

1. Transcription factors

2. Paracrine factors

3. Cell adhesion factors

4. Non-diffusable molecules

#Question id: 9194

#Unit 9. Diversity of Life Forms

Zoonotic disease

#Question id: 9195

#Unit 9. Diversity of Life Forms

Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

#Question id: 9196

#Unit 9. Diversity of Life Forms

If all individuals in the last remaining population of a particular frog species were all highly elated, which type of diversity would be of greatest concern when planning to prevent the species from going extinct?

#Question id: 9197

#Unit 9. Diversity of Life Forms

What is the biological significance of genetic diversity between populations?

#Question id: 9198

#Unit 9. Diversity of Life Forms

Tropical forests are being converted to farm or pasture land at an alarming rate, and one major focus is on the biodiversity and the impact to these ecosystems. What is a direct benefit to humans that helps explain why these forests need to be preserved?

#Question id: 9199

#Unit 9. Diversity of Life Forms

Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?