Which TWO descriptions are examples of mechanical energy?

1. a bird flying in the air

2. a tiger ready to pounce on its prey

3. a child chewing food

4. a girl sitting on a motionless swing

5. a log of wood on a riverbank

Which of the following factors affects the strength of the gravitational force between two objects? Mass of the objects Shape of the objects Temperature of the objects Composition of the objects

Which of the following normally results from meiosis in a human cell that contains 46 chromosomes? A. an egg cell with 46 chromosomes B. a liver cell with 23 chromosomes C. a blood cell with 46 chromosomes D. a sperm cell with 23 chromosomes

The restriction enzymes that cut the bacteriophage DNA cannot cut the bacterial chromosomal DNA. Explain this statement.

Which best describes the process of radiation? A. Warm air transfers heat energy to cold air. B. Sunlight transfers energy to land, air, or water. C. Cold air transfers heat energy to warm air. D. Reflections from the surface warm the atmosphere.

Because of their function, we would expect muscle cells to have a large number of which cellular organelle?

Two species of birds feed on berries. the birds are active at different times of the day, and do not come into contact with one another. nonetheless, the presence of one species limits the survival and reproduction of the other.

Satellite imaging can be used to: predict weather analyze geological structures locate oil deposits all of the above

Which bird (s) was/were most successful after 1,000,000 years? Why were they more successful?

A student makes the analogy that the cardiovascular system is like a highway. Why is this a good analogy?

The distribution of related animals and plants across the world