What do scientists estimate is the approximate age of the planet earth? a) 660 million years b) 3.5 billion years c) 4.6 billion years d) 12.2 billion years

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

Did you know that a blue wales tongue weighs more than an elephant?

18. how do the cells in meiosis differ from the cells in mitosis?