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Biology
Plant hormones can have different effects at different concentrations. this explains how ________.
Which of the following remains relatively constant in an ecosystem? A-number of organisms B-amount of matter C-number of species
Astronauts who visit and stay at the International Space Station are also scientists because they A) participate in the race into space. B) collect data to improve man’s knowledge of space. C) predict weather on Earth using satellite pictures. D) travel out of the space station and repair damage to the exterior.
If you roll one ball across a tile floor and another across a thick carpet, which one will go faster? What force is acting on the slower ball?
Inhalation in humans is achieved by contraction of which muscles
As more information about the structure of the atom was gathered, atomic models evolved. Max Planck discovered that electron energies are quantized, which means electrons can only exist at certain energy levels. Which model best illustrates this concept?
How did Lamarck propose that species change over time?
what are somatic cells
Neutrophils primarily help fight bacterial infections.
What is the name of the part of the human skeleton which protects our brain?
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