Which of these scenarios could be a direct cause of a disease becoming a pandemic? 1- Patient sneezing on a doctor

2- Sick family returning from a foreign country

3- Mosquito in a field next to houses

4- Sick child attending school

The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem

What is the period of cell life when it is conducting

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid