Answer: b
Explanation:
An open system is when nutrients and waste are moved through the body freely through the body cavity, rather than being enclosed in veins.
Close the yield gap. By 2050, 120 million hectares of natural habitats will be converted to farming in developing countries, the World Wildlife Fund estimates. ...
Use fertilizer more efficiently. ...
Raise low water productivity. ...
Target food for direct consumption. ...
Reduce food waste.
Answer:
as low as possible and using scanning objective (4x). ... then low power, you won't be able to focus anything under high power.
The process that occurs before hypothesis is Identifying the variables.
