If the amino acin the protiens of 2 organisms are similar, why will their dna also be similar?

What do animals wth echolocation have in common other than echolocation

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.