Scientists often perform repeated investigations. What is the main reason for this.

One problem with wind energy as a major source of electricity is that it is nonrenewable the cost of land in populated areas the major air pollution it can cause that it does not work at night

The chart below indicates the levels of three aquifers in a local community. Level of Input and Output in Three Aquifers Aquifer Input and Output Aquifer 1 Input: 360 gallons Output: 600 gallons Aquifer 2 Input: 521 gallons Output: 500 gallons

If a characteristic is X-linked it A. occurs mostly in males. B. occurs mostly in females. C. is always fatal. D. isn't any different than a normal allele.

A baby stroller is a rest on top of a hill which is 10 m high. The stroller and baby have a mass of 20 kg. What is the potential energy of the baby and stroller? Formula: PE = m g h (Gravity near earth is 9.8 m/s²)

What causes the tail of a comet

What are seven places that carbon exists?

What's the mass of a double mint gum?

Which phase of meiosis I is responsible for dividing the cytoplasm? - prophase I - metaphase I - anaphase I - telophase I

Phrase to make it true. 1. Gene regulation is the ability of an organism to control which genes are transcribed.

Which of the following are tenets of the cell theory a. cells are the building blocks of life b. cells all arise from pre existing cells c. cells are the basic living units of structure an function d. all of above