stussyamanda stussyamanda

02-11-2017
Biology

contestada

which were the earliest oxygen-producing life-forms?
a.cyanobacteria.
b.seaweed.
c.dinosaurs.
d.ferns.

Respuesta :

themask101 themask101

02-11-2017

A is the correct answer

Answer Link

Аноним Аноним

23-01-2019

A. CYANOBACTERIA is the CORRECT answer!

Answer Link

Otras preguntas

The dating of geological formations is an example of a beneficial use of (1) isomers(2) electrolytes(3) organic compounds (4) radioactive nuclides

Compared to a 26-gram sample of NaCl(s) at STP, a 52-gram sample of NaCl(s) at STP has(1) a different density(2) a different gram-formula mass(3) the same chem

What the center of X^2+(y+3)=9

The balanced equation below represents a molecule of bromine separating into two bromine atoms. Br2-->Br + Br What occurs during this change? (1) Energy is a

Which pair of formulas represents two compounds that are electrolytes?(1) HCl and CH3OH(2) HCl and NaOH(3) C5H12 and CH3OH(4) C5H12 and NaOH

Given the balanced equation: I2(s) + energy ==> I2(g) As a sample of I2(s) sublimes to I2(g), the entropy of the sample (1) increases because the particles a

what is the solution to 2x-y=9

Which reactants form the salt CaSO4(s) in a neutralization reaction? (1) H2S(g) and Ca(ClO4)2(s) (2) H2SO3(aq) and Ca(NO3)2(aq) (3) H2SO4(aq) and Ca(OH)2(aq) (4

If the slope of a line is ½ and the y-intercept is 3, what is the x-intercept of the same line? a. 6 b. 3/2 c. 0 d. -2/3 e. -6

Which polyatomic ion contains the greatest number of oxygen atoms? (1) acetate (3) hydroxide (2) carbonate (4) peroxide