All categories

2 years ago

¿A qué se debió el incremento en la cantidad de oxígeno en la atmósfera hace miles de millones de años?

1 answer:

3 0

Scientists think that algae first evolved approximately 2.7 billion years ago, and soon after this oxygen began to exist in the atmosphere. Photosynthesis by primitive plants and algae released oxygen, which gradually built up in the atmosphere.

Explanation:

You might be interested in

True or False: The difference between -er/-ir present tense conjugations is in the "nosotros/as" form Answer choices: False True

Nataly_w [17]

The answer is true. Have a good day.

8 0

2 years ago

Read 2 more answers

How did diego velazquez audition for the role of king phillip's court painter

lesya [120]

Because Velázquez had connections through his father in-law. He earned the chance to paint a portrait of the powerful Count-Duke of Olivares. The countduke told King Philip IV about Velázquez . When the king saw the completed portrait he decided that no one else would paint him and appointed Velázquez one of his court painters.

4 0

2 years ago

What is a Lechon? A. a roast pig B. a rice dish C. a type of tamale D. a dessert

monitta

The answer is...
A. a roast pig

3 0

3 years ago

Read 2 more answers

osé en la biblioteca. Question 2 with 1 blankYo bien, gracias. Question 3 with 1 blankNosotras en la cafetería. Question 4 with

Llana [10]

Answer:

1. José está en la biblioteca.

2. Yo estoy bien, gracias.

3. Nosotras estamos en la cafetería.

4. Tú estás en el laboratorio.

5. Ellas están en la clase.

6. Elena está en la librería.

7. Ana y yo estamos en la clase.

8. Javier y Maribel están en el estadio.

9. ¿Cómo está usted?

10. Nosotros estamos en la cafetería.

11. Yo estoy en el laboratorio.

12. Carmen y María están enfermas.

13. Tú estás en la clase.

Explanation:

In this exercise, we practice the use of the Spanish verb estar. In Spanish, there are two different verbs for which there is one equal in English: TO BE.

ser/estar = to be

The conjugation of the present tense of the verb estar:

1. yo estoy 1. nosotros/as estamos

2. tú estás 2. vosotros/as estáis

3. él/ella/usted está 3. ellos/as/ustedes están

The basic use of this verb is to indicate the location of the people/things.

The sentences 1, 3, 4, 5, 6, 7, 8, 10, 11, 13 show the examples of the location of the people (where they are in the moment of speaking).

The another usage is of a our health condition (how we feel at the moment of speaking).

2. I am well, thanks.

9. How are you?

12. Carmen and Maria feel sick.

6 0

2 years ago

Consulta Algunas de Las funciones del representante de curso

Kamila [148]

Answer:

establecer el orden da la clase

6 0

2 years ago