The contractile vacuole is responsible for painting the water balance in many protists, like the euglena above. maintaining this water balance is an example ofa. equilibriumb. homeostasis  c. active transportd. passive transport

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

Why are recessive alleles not removed from populations over time? a.individuals can pass recessive alleles on to offspring b.recessive alleles are removed with enough time c.recessive alleles will always reappear after being removed

Abird is flying in the air at a 4 m/s. if the mass of the bird is 7kg what is it’s kinetic energy