Agroup of scientists examined a meteorite from mars and found a carbon-rich substance that is produced when microorganisms decay. they concluded that the meteorite provided evidence there was once life on mars. why is this an emerging idea?

Which of the following correctly describes the appearance of muscle tissue found in the heart? (2 points) single-nucleus, non-striated, short cells single-nucleus, striated, branching cells multinucleated, non-striated, branching cells multinucleated, striated, long threadlike cells