Q: Why do crystals have relatively sharp and well-defined melting points? A:
OPTIONS:
- particular intermolecular forces
- variable intermolecular forces
- angular intermolecular forces
- uniform intermolecular forces

Answer: uniform intermolecular forces

Q: What helps push the fetus from the uterus during birth? A:
OPTIONS:
- glands
- tremors
- Shaking
- contractions

Answer: contractions

Q: Sexual reproduction involves haploid gametes and produces a diploid zygote through what process? A:
OPTIONS:
- infection
- vivisection
- sedimentation
- fertilization

Answer:
fertilization