Which of these events occurs first? select one: a. cleavage b. implantation c. formation of the placenta d. gastrulation?

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

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

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above