Chọn câu đúng 1. Phản ứng Biuret dương tính cho tất cả các acid amin
2. Acid amin serin có chứa nhóm – SH
3. Glutathiol chứa acid glutamic, glycin, histidin
4. Các tripeptide, protein luôn cho phản ứng Biuret dương tính

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

Which term refers to the total dollar value of the goods and services produced in a country in a year?

The process by which natural forces move weathered rock and soil brim one place to another is called