Which of the following statements provide evidence to support the big bang theory? Select the two correct answers. Small spiral galaxies become larger elliptical galaxies when they collide.

Dark matter makes up the majority of matter in the galaxy.

The ratios of hydrogen and helium in the universe match those of the early universe.

The universe began as a very high density singularity.

a and b sometimes have a positive value

c. newton's third law of motion

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =