Q: Blood from what organs enters the left atrium of the heart? Choices: - Lymph nodes - intestines - Brain - lungs A:
lungs

Q: Each kidney is supplied by a renal artery and what else? Choices: - spinal cord - brain vein - coronary artery - renal vein A:
renal vein

Q: Distinct from a suspension, a solution is considered what type of mixture? Choices: - gaseous - continuous - heterogeneous - homogeneous A:
homogeneous

Q: Which branch of biology studies animal behavior? Choices: - microbiology - anthropology - embryology - ethology A:
ethology