Q: What is the name of the temporary organ that begins to form from the trophoblast layer of cells shortly after implantation? Choices: - uterus - embryo - appendix - placenta A:
placenta

(Question)
Q: What do you call a close relationship between two species that benefits both? Choices: - commensalism - primordial relationship - parasitic relationship - symbiotic relationship A:
(Answer)
symbiotic relationship

Ques: Q: During the scientific revolution, who proposed that the sun, not earth, is the center of the solar system? Choices: - Newton - Galileo - janus - copernicus A:
Ans: copernicus

(Q).
Q: What occurs when the cartilage at the ends of the bones breaks down? Choices: - stress fracture - rheumatism - osteoporosis - osteoarthritis A:
(A).
osteoarthritis

Ques:Q: What do we call the temperature at which a substance melts? Choices: - boiling point - precipitation point - evaporation point - melting point A:

Ans:melting point

Q: What are mars' moons thought to be? Choices: - guerrillas asteroids - new asteriods - common asteriods - captured asteroids A:
captured asteroids