WILL MARK BRAINLIEST IF CORRECT Which two activities provide the reactants for cellular respiration?

releasing air and exercising
breathing in air and exercising
releasing air and eating food
breathing in air and eating food

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.

The sketch shows a rynchosaur, an extinct animal that is known only from fossils. there has been much debate about the classification of these creatures. some scientists suggest that they belong with primitive amphibians, and some think they are related to snakes and lizards.the data equally support both cases. which statement best explains how to draw a cladogram that includes the rynchosaur? draw the cladogram for amphibians. draw the cladogram for reptiles. draw two cladograms, both showing the traits, and leave it as a hypothesis. draw two cladograms, both showing the traits, and have scientists vote

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?