Grain is eaten by cows, and cows are eaten by humans. if the ecological transfer efficiency between each trophic level is 10 percent, how much grain is required to produce 70 kg of human biomass?

Early in development, every neuron has the potential to

How is humity related to air pressure

Why is blood type AB + considered the universal receiver?

In a controlled experiment, what is manipulated by the researcher?

Which feature is used to classify a rock based on its composition?

What contains both communities and ecosystems?

Which of the following represents a way that animals in a zoo are influenced by their environment? a. increased natural instincts b. decreased aggression c. unnatural behavior d. increased appetite

when the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of on organisms genes. which biomolecule contains all of the organisms genes

Read the list of common household substances. Antacid, orange juice, toothpaste, vinegar Which of these substances are likely to have a bitter taste? Antacid, vinegar Antacid, toothpaste Orange juice, vinegar Orange juice, toothpaste

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs