Q: Q: What are chemical messengers that control sexual development and reproduction? Choices: - lipids - proteins - neurotransmitters - sex hormones A:
A: sex hormones

Q: Q: What is the outer layer of skin, consisting almost entirely of epithelial cells? Choices: - hypodermis - connective tissue - dermis - epidermis A:
A: epidermis

Q: Q: What is a feature that prokaryotes lack? Choices: - epidermis - cell wall - plasma - nucleus A:
A: nucleus

Q: Q: What branch of science is the study of the solid earth? Choices: - palentology - ecology - biology - geology A:
A: geology