Explain why humans can be at different trophic levels on different food chains, but they can never occupy the lowest trophic level.

One sign of infectious canine kennel cough is

In an ecological pyramid, what happens to energy, biomass and number of species as you move up?

How many food calories can a human burn up in an hour by exercising at this rate? (remember that only 20.0 % of the food energy used goes into mechanical energy.) ?

The reason that the genetic code can correctly specify the order of amino acids in a polypeptide is

What's is the equator

The first organisms to colonize a newly formed, lifeless habitat are part of

Geetha is 13 years old. She weighs 60 kg and is 4 feet and 2 inches tall. What is Geetha's BMI and weight category?

What is a biodiversity hotspot? A. Areas with high numbers of endemic species. B. Areas with high density of species C. Areas with endangered species. D. Areas that are along the equator and experience high temperatures annually.

Which of the following is not a form of forced migration? a. fear of imprisonment and death. b. home destroyed by floods or hurricanes c. food shortage d. chance for better wages.

Question 8 of 30 Which of the following is a base? Baking soda in water, pH 11 Milk, pH 7.1 Tomato juice, pH 4.1 NextReset