JustCallMeSub JustCallMeSub

22-06-2022
Physics

contestada

When did stromatolites appear on Earth?

A. Hadean
B. Mesozoic
C. Archean

Respuesta :

hasja2272 hasja2272

22-06-2022

Answer:

It would be D. Proterozoic because they appeared 542 million years ago.

Answer Link

Otras preguntas

Governor of State X is considering investing on a 100-mile highway connecting state's two cities: A and B. Today, governor is presented with three options: Opti

Alexis opens a money market account at Lone Star Bank. The account compounds interest continuously at a rate of 7. 85%. If she initially invests $5,000, how muc

the following skeletal oxidation-reduction reaction occurs under acidic conditions. write the balanced oxidation half reaction. io3- cu cu2 i2

Reaction: 2K2O+4MnO2+3O2(g)  4KMnO4 (aq) If you start with 291(g) of MnO2, how many moles of NaOH will you start with? (The molar mass of MnO2 is 87 for every

In "Suck3r," which detail best helps develop the theme Harsh treatment of another person may have enduring consequences? a)Months after Maybelle's rejection of

let {wn} be the sequence of waiting times in a poisson process of internsity lamda =1 . show that xn = 2^n exp{-wn} defines a nonegative martingale

Which of the following new pieces of technology most directly caused the trench warfare of the Western Front of World War I? Machine guns O Poison gas O Airplan

Explain at least one way each island group of the Pacific is different from the other two.

find the value of b squared if b equals 3

Which system is represented in the graph? y < x2 – 6x – 7 y > x – 3 y < x2 – 6x – 7 y ≤ x – 3 y ≥ x2 – 6x – 7 y ≤ x – 3 y > x2 – 6x – 7 y ≤ x –