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Lesechka [4]
3 years ago
9

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

Spanish
1 answer:
Maslowich3 years ago
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:

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60 Points
Scrat [10]

Answer:

¡Hola! Yo trabajo como voluntaria en el refugio de animales. Yo les limpio las jaulas a los animales. Las limpio de lunes a viernes. Les doy comida a los animales; se la doy de lunes a viernes. Para llegar al refugio de animales, paro en la señal de alto y doblo a la izquierda en la calle Orange. El refugio de animales está a la derecha, entre el restaurante y el supermercado.

Explanation:

Translation: Hi! I volunteer at the animal shelter. I clean the cages for the animals. I clean them from Monday to Friday. I feed the animals; I give it to him from Monday to Friday. To get to the animal shelter, I stop at the stop sign and turn left onto Orange Street. The animal shelter is on the right, between the restaurant and the supermarket.

<em>-- Hope this helped :) !</em>

5 0
2 years ago
En el mapa Argentina está a la (derecha/encima) de Chile. 2. El reloj está (entre/allá) las ventanas. 3. Hay una librería (sobre
STatiana [176]

Answer:

1. derecha

2. entre

3. cerca

4. está

5. delante

6. estoy

Explanation:

You have to choose the correct option.

1. Where is Argentina located in relation to Chile?

2. Where is the clock with respect to the windows?

3. Where is the bookstore regarding the university?

4. Where is the backpack?

5. Where are we regarding the library?

6. How am I? I wanna study?

8 0
2 years ago
En una calle sin veredas los peatones deben caminar
Ganezh [65]

Answer:

should not walk down the street if there are no sidewalks

3 0
2 years ago
Need answers to Question 2. 1-10 and question 3 thank you
lisov135 [29]
1 - B
2 - G
3 - F
4 - I
5 - D (Isle of the Pelicans.. Alcatraz means Pelicans.)
6 - J
7 - A
8 - H
9 - C
10 - E

3. True.

3 0
3 years ago
Sagot sa inyong
Novosadov [1.4K]

Answer:

jjjlhkljlhlglfkfkflhlliydnhlf

6 0
3 years ago
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