In a scientific experiment how many independent variables should be tested at the same time

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above

What does the last 14 seconds on the "cosmic calendar" represent?

The fish in a pond are dying because of algal bloom. Algal bloom is caused by the presence of excess phosphorus or sulfur in the pond.

What caused the dark peppered moth to flourish the industrial revolution

Why are neurons necessary for animal systems and why are they only found in animal systems?

which of the following is a energy consuming process a. excretion b. anabolism c. both a and b d. catabolism

Describe what it means for a field of study to be considered a science

Why are organisms that have organs classified as more complex than organisms without organs?

What is the final energy source that the muscles need in order to move? fat, sugar, ATP, or glycogen

What provides clues about the ocean and climate including the type of marine life presented? A. the density, temp, and salinity of ocean water. B. the volume, density, and salinity of the ocean water C. the mass, volume, and density in ocean water D.