Q: Each vertebral vein also flows into which vein? Choices: - trichina - xerophyte - spiral - brachiocephalic A:
brachiocephalic

(Question)
Q: What two things are used in optical instruments to reflect or refract light? Choices: - orientations and lenses - mirrors and magnifiers - prisms and microscopes - mirrors and lenses A:
(Answer)
mirrors and lenses

Ques: Q: What are the most successful organisms on earth? Choices: - trees - humans - pests - bacteria A:
Ans: bacteria

(Q).
Q: Is purifying water a simple or complicated process? Choices: - expensive - impossible - simple - complicated A:
(A).
complicated

Ques:Q: What are the tiny sacs in the lungs where gas exchange takes place? Choices: - bronchi - ganglion - cilia - alveoli A:

Ans:alveoli

Ques: Q: Quantities have two parts: the number (how many) and what else? Choices: - the motion - the member - the credit - he unit A:
Ans:
he unit