The sun is a significant factor that helps to support life. Which of the following earht-sun relationship is not true. A) The sun’s gravity keeps Earth from flying off into space
B) Earth is the 4th planet from the sun, which is a perfect distance to utilize the sun’s energy.
C) The Sun is key to dynamic processes on Earth, like weather, climate, and cycling of water.
D) If earth were any further from the Sun, more ice would form reflecting more heat and making the planet similar to Mars.

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?