Answer the following question given this paragraph: In other covalent bonds, electrons are shared equally. These bonds are called nonpolar covalent bonds. Neither atom attracts the shared electrons more strongly. As a result, the atoms remain neutral in charge. The oxygen (O 2 ) molecule in the Figure below has two nonpolar bonds. The two oxygen nuclei have an equal force of attraction for their four shared electrons. Q: How are electrons shared in covalent bonds? A:
OPTIONS:
- randomly
- orderly
- unequally
- equally
equally

Answer the following question given this paragraph: Enzymes are proteins that speed up biochemical reactions in cells. Antibodies are proteins that target pathogens for destruction. Q: What are the proteins called that speed up biochemical reactions in cells? A:
OPTIONS:
- peptides
- hormones
- carbohydrates
- enzymes

Answer: enzymes

Question: Answer the following question given this paragraph: The star constellation "Orion, The Hunter". Orion is one of the most beautiful of all constellations, and one of the easiest to find. It looks like a large (slightly twisted) rectangle high in winter's south-southeastern sky. Two of the brightest stars in the evening sky lie at opposite corners of the rectangle: bright orange-red Betelgeuse at the northeastern corner (upper left in the photo) and even brighter Rigel at the southwest (lower right in the photo). Betelgeuse is at least 300 times the Sun's diameter, and perhaps much more. It puts out about 100,000 times more energy than the Sun does. When Betelgeuse dies, it will create a fireball that will briefly outshine billions of normal stars. Betelgeuse is a red giant and Rigel is a blue giant. Q: Which constellation looks like a rectangle high in winter's south-southeastern sky? A:
OPTIONS:
- Caelum
- Apus
- Andromeda
- orion
Answer: orion

input with options: Answer the following question given this paragraph: Like the immune systems of other vertebrates, the human immune system is adaptive. If pathogens manage to get through the body's first two lines of defense, the third line of defense takes over. The third line of defense is referred to as the immune response . This defense is specific to a particular pathogen, and it allows the immune system to "remember" the pathogen after the infection is over. If the pathogen tries to invade the body again, the immune response against that pathogen will be much faster and stronger. Q: The third line of defense of the immune system is called? A:
OPTIONS:
- the sudden response
- the asymptomatic response
- the malignant response
- the immune response
output: the immune response

Q: Answer the following question given this paragraph: Plants may have colonized the land as early as 700 million years ago. The oldest fossils of land plants date back about 470 million years. The first land plants probably resembled modern plants called liverworts , like the one shown in Figure below . Q: The oldest fossil of land plants date back how many millions of years? A:

OPTIONS:
- 520 million years
- 350 million years
- 430 million years
- 470 million years

A: 470 million years

Answer the following question given this paragraph: Of course, a net external force is needed to cause any acceleration, just as Newton proposed in his second law of motion. So a net external force is needed to cause a centripetal acceleration. In Centripetal Force, we will consider the forces involved in circular motion. PhET Explorations: Ladybug Motion 2D Learn about position, velocity and acceleration vectors. Move the ladybug by setting the position, velocity or acceleration, and see how the vectors change. Choose linear, circular or elliptical motion, and record and playback the motion to analyze the behavior. Q: Of course, a net external force is needed to cause any acceleration, just as newton proposed in his second law of what? A:
OPTIONS:
- land
- gravity
- speed
- motion
motion