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

(Question)
Q: What's the process responsible for the presence of oxygen in our atmosphere? Choices: - respiration - ozone - glycolysis - photosynthesis A:
(Answer)
photosynthesis

Ques: Q: What is sulfur trioxide dissolved in to form sulfuric acid? Choices: - silver - mercury - lead - water A:
Ans: water

(Q).
Q: What type of cell layer do flatworms have? Choices: - epidermis - cuticle - endoderm - mesoderm A:
(A).
mesoderm

Ques:Q: What is the effect on pressure when the area of applied force is very concentrated? Choices: - direction increases - pressure disperses - pressure reduces - pressure increases A:

Ans:pressure increases

Q: Gall bladder removal surgery does not seriously affect digestion because ______ is still being produced. Choices: - saliva - blood - plasma - bile A:
bile