Q: Which theory explains how populations of organisms can change over time? Choices: - free by natural selection - changes by natural selection - intelligent selection - evolution by natural selection A:
evolution by natural selection

(Question)
Q: What moves sediments after they have formed? Choices: - photosynthesis - migration - perspiration - erosion A:
(Answer)
erosion

Ques: Q: What is the only amphibian without legs? Choices: - alligators - frogs - newts - caecilians A:
Ans: caecilians

(Q).
Q: What is essential for forming new genes? Choices: - enough mutations - enough chromosomes - chromosome deversity - large mutations A:
(A).
large mutations

Ques:Q: Breaking of weak bonds, which tend to form between positive and negative charges, does not require much what? Choices: - catalyzation - heat - time - energy A:

Ans:energy

Ques: Q: In dioecious animals, females generally produce what contribution to reproduction? Choices: - milk - warmth - intelligence - eggs A:
Ans:
eggs