tbreannellis tbreannellis

09-08-2017
Biology

contestada

what created oxygen in the early atmosphere
Photosynthetic bacteria
Asteroids hitting the earth
plankton
Volcanic eruptions
forests

Respuesta :

Аноним Аноним

09-08-2017

Oxygen was created by the first signs of photosynthesis, done by plants and algae. =)

Answer Link

Otras preguntas

Which of the following is not included in the assets of a commercial bank in India?a. advancesb. depositsc. investmentd. money at call and short notice

If nominal GDP rose by 10 percent and the price index increased from 100 to 105 in a given year, real GDP: a. rose by 5 percent. b. fell by 5 percent.

You want to start an infusion of noradrenaline at 0.05micrograms per kg per minute. You have an infusion containing 8 mg in 50 ml. You patient weighs 80 kg. Wha

Which is the best estimate for the capacity of 4 mugs of tea?A. 4 cupsB. 4 pintsC. 4 quartsD. 4 gallons

When 10mL of an aqueous solution of KMnO₄ was titrated in acidic medium , equal volume of 0.1M of an aqueous solution of ferrous sulphate was required for compl

A teacher (t) is located 18 feet from a library (L). The teacher notices a drone (d) flying at 40 degree angle of elevation from his line of sight . What is the

Which of the following statements is NOT correct? Select one: O a. If you lend money to a firm, you have a residual claim over the income and assets of the firm

1. Si el ciclista sale del punto A hasta el punto B, Señalar en la siguiente grafic A. B. C. Cuál es la Trayectoria Cuanto se desplazó. El espacio recorrido B s

Using traditional methods it takes 8.5 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been pr

Consider a biased coin where 40% of the time will give heads and it is tossed five consecutive times. Can the whole process be considered a Binomial experiment?

Q&A Platform for Education Platform Explore for Education