bribri674 bribri674

22-05-2017
Biology

contestada

Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.
A) hydrogen
B) nitrogen
C) oxygen
D) sulfur

Respuesta :

larrytrip100 larrytrip100

22-05-2017

c)oxygen is the correct answer i am very sure.

Answer Link

Chelsea200 Chelsea200

24-02-2019

The correct answer is oxygen

Answer Link

Otras preguntas

● Provide THREE critical evaluations of one's contribution to environmental health and safety in one's community. Use examples to illustrate your answer.

Which of the following is a function? y = |x| + 3 y = x2 + 3x y = 2x + 1 y = x2 - 5x

What process do plants and animals share in common

Can someone help me with this please?

Women with and without lymphedema following breast cancer surgery were compared in terms of their presurgical body mass index (BMI). Which design did the resear

Find the elements of range that correspond to the elements 0 and 3 of the domain, [tex]f = {(x, y): 3y - 2x=6}[/tex]

What influenced the history of healthcare in the United States? A)Elimination of employer-provided healthcare B)Industrial Revolution C)Cost to create new laws

Please help me as fast as possible! I really need help! I’ll mark as brainliest for correct answers. Please help fast please

Please help me solve this Piece-Wise Function

short introduction about school