Q: What basic structure holds plants upright, bears leaves and other structures, and transports fluids between roots and leaves? Choices: - branches - flowers - leaves - stem A:
stem

Q: Dividing net force by total mass yields what? Choices: - energy - transmission - movement - acceleration A:
acceleration

Q: Q: Vertebrates lacking what structures often use lungs for gas exchange? Choices: - pores - nostrils - spores - gills A:
A: gills

Question: Q: What can bacterial stis be cured with? Choices: - antioxidants - pesticides - antiviral drugs - antibiotics A:
Answer: antibiotics

*Question*
Q: What is the blastocyst called after implantation? Choices: - trophoblast - an nucleus - an produce - an embryo A:
**Answer**
an embryo

*Question*
Q: How many valence electrons do neutral phosphorus atoms have? Choices: - nine - three - four - five A:
**Answer**
five