In which way are a euglena and a volvox different?
A euglena is an individual cell, while a volvox is a colony of cells.
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15
Why do thunderstorms most often occur in the summer months?
Higher temperatures increase the rate of evaporation and convection.
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15
Which function does the nucleus of a cell perform?
It controls the activity of the cell.
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15
What causes convection currents to occur on Earth?
warm air rising, cool air sinking
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15
A homozygous dominant black angelfish (BB) is crossed with a homozygous recessive gold angelfish (bb). What is the probability their offspring will be gold?
0%
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15
How do the digestive system and the circulatory system work together in the human body?
The digestive system extracts nutrients from food, while the circulatory system transports those nutrients.
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baam
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gold
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rocket
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baam
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banana
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rocket
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fairy
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25
thief
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15
What is one way the respiratory system and the circulatory system work together in the human body?
The respiratory system takes in oxygen, and the circulatory system delivers the oxygen to the cells of the body.
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15
Two students pull on a rope in opposite directions, each with a force of 100 N. What would most likely happen to the rope if the student on the left increased her force to 125 N?
The rope would go from motionless to accelerating to the left.
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15
What type of weather is most likely observed in an area when cirrus clouds are present?
calm weather
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lifesaver
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star
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gift
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thief
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15
How does the mechanical energy of a rock change as it falls from a mountain?
The mechanical energy remains the same because potential energy is changed into kinetic energy.
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15
How do people determine if a vehicle in which they are sitting is moving?
by comparing their position to a fixed object outside the vehicle.
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boom
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seesaw
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rocket
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banana
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15
Over a period of several hours, a barometer shows rapidly decreasing air pressure. What type of weather will most likely occur next?