Scientists have discovered algae fossils that are: 2 million years old
1 million years old
1,000 years old
1.5 billion years old

(please don't send a link as an "answer")

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.