Most of the animals in existence today had their origins during the: A. Mesozoic Era
B. Cambrian Period
C. Cretaceous Period
D. Devonian Period

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

How do living things obtain phosphorus