Question

multiple choice: choose the best answer. 17. which of the following is an example of a legume? a wheat b apples c soybeans d rice 18. why are amino acids important? a they are the building blocks of proteins needed by animals and people. b they fix nitrogen to make the gas into a form that can be used by animals and people. c they help release oxygen into the soil. d they help return nitrogen into the soil. 19. tiny organisms called bacteria change nitrogen that is present in soil into a compound called which of the following? a nitrates b legumes c amino acids d ammonia 20. which type of rock is formed by nitrogen compounds that drift to the ocean floor? a igneous b sedimentary c metamorphic d sandstone 21. what is the main purpose of fertilizers? a to break down nitrogen. b to help break up soil. c to prevent dead zones. d to add nitrogen to soil.

Explanation:

1. Las legumbres son plantas de la familia Fabaceae y los frijoles de soya son un ejemplo.
2. Los aminoácidos son los bloques de construcción de las proteínas.
3. Las bacterias en el suelo convierten el nitrógeno en nitratos.
4. Las rocas sedimentarias se forman a partir de partículas que se depositan, incluyendo compuestos de nitrógeno en el fondo marino.
5. Los fertilizantes se usan principalmente para agregar nutrientes, incluyendo nitrógeno, al suelo.

Answer:

1. C. Soya beans
2. A. They are the building blocks of proteins needed by animals and people.
3. A. Nitrates
4. B. Sedimentary
5. D. To add nitrogen to soil.