Q: What is the product of microfilament movement powered by chemical energy? Choices: - blood circulation - nerve stimulation - muscle fusion - muscle contraction A:
muscle contraction

(Question)
Q: Changing electric and mnagnetic fields radiate outward when? Choices: - particles lose their charge - particles multiply - firing particles accelerate - charged particles accelerate A:
(Answer)
charged particles accelerate

Ques: Q: What are embedded in the membranes of b cells and bind a variety of antigens through their variable regions? Choices: - b.a.p cell receptors - a.m. cell receptors - er cell receptors - b cell receptors A:
Ans: b cell receptors

(Q).
Q: What scientific word, which gives its name to a type of rock, means "to change form"? Choices: - evaporation - evolution - igneous - metamorphism A:
(A).
metamorphism

Ques:Q: What causes reduction of elasticity in all organs? Choices: - low vitamin D - radiation - weight gain - age A:

Ans:age

Ques:Q: The diversity of life on earth today is the result of what? Choices: - spontaneous mutation - generation - mass extinction - evolution A:

Ans:
evolution