Q: What rod provides stiffness to counterbalance the pull of muscles? Choices: - vertebrae - spinal cord - mesoderm - notochord A:
notochord

(Question)
Q: What does continental crust grade into at continental margins? Choices: - ocean floor - storm crust - remnants crust - oceanic crust A:
(Answer)
oceanic crust

Ques: Q: What theory brings together continental drift and seafloor spreading? Choices: - theory of order tectonics - theory of water tectonics - theory of front tectonics - theory of plate tectonics A:
Ans: theory of plate tectonics

(Q).
Q: What is the smallest unit of a living thing? Choices: - electron - proton - organ - cell A:
(A).
cell

Ques:Q: What term is used to describe the average weather of a place over many years? Choices: - atmosphere - landscape - meteorology - climate A:

Ans:climate

Ques: Q: What is the enclosed, fluid-filled membrane that surrounds and protects the fetus and is attached to the placenta? Choices: - epithelial sac - umbilical sac - womb - amniotic sac A:
Ans:
amniotic sac