Answer the following question given this paragraph: In ferns, the sporophyte is dominant and produces spores that germinate into a heart-shaped gametophyte. Q: What shape is the gametophyte in ferns? Choices: - circular - rectangular - diamond - heart-shaped A:
heart-shaped
(Question)
Answer the following question given this paragraph: Most reptiles reproduce sexually and have internal fertilization. Q: Most reptiles reproduce sexually and have what type of fertilization? Choices: - additional - external - mechanical - internal A:
(Answer)
internal
Ques: Answer the following question given this paragraph: Image copyright SergiyN, 2014. Coil of copper wire, which conducts electricity well due to metallic bonds . Used under license from Shutterstock. com. Q: What gives a coil of copper wire the ability to conduct electricity well? Choices: - optical bonds - metallic electrons - metallic ions - metallic bonds A:
Ans: metallic bonds
(Q).
Answer the following question given this paragraph: Corrosion is a galvanic process that can be prevented using cathodic protection. CONCEPTUAL PROBLEMS 1. Q: What is a galvanic process that can be prevented using cathodic protection? Choices: - explosion - sublimation - vaporization - corrosion A:
(A).
corrosion
Ques:Answer the following question given this paragraph: The deadly nerve gas Sarin irreversibly inhibits acetycholinesterase. What effect would Sarin have on muscle contraction? After depolarization, the membrane returns to its resting state. This is called repolarization, during which voltagegated sodium channels close. Potassium channels continue at 90% conductance. Because the plasma membrane sodiumpotassium ATPase always transports ions, the resting state (negatively charged inside relative to the outside) is restored. The period immediately following the transmission of an impulse in a nerve or muscle, in which a neuron or muscle cell regains its ability to transmit another impulse, is called the refractory period. During the refractory period, the membrane cannot generate another action potential. The refractory period allows the voltage-sensitive ion channels to return to their resting configurations. The sodium potassium ATPase continually moves Na+ back out of the cell and K+ back into the cell, and the K+ leaks out leaving negative charge behind. Very quickly, the membrane repolarizes, so that it can again be depolarized. Q: The period immediately following the transmission of an impulse in a nerve or muscle, in which a neuron or muscle cell regains its ability to transmit another impulse, is called the ______ period. Choices: - activation - extraction - interstitial - refractory A:

Ans:refractory
Answer the following question given this paragraph: Water pollution occurs when chemicals, sewage, trash, or heat enter water resources. Water pollution is threatening the limited supply of clean, fresh water that human beings and other living things depend on. Q: Water pollution occurs when chemicals, sewage, trash, or heat enter what? Choices: - renewable resources - air resources - natural resources - water resources A:
water resources