Which are substances that are moved into cells by facilitated diffusion?

viruses and bacteria

ions such as K+

fat-soluble molecules

oxygen and carbon dioxide

Why do two grams of fat provide a different amount of energy than two grams of carbohydrates? (2-3 sentences)

Because DNA sequences in humans and chimpanzees are very similar, ___ A) humans must have evolved from chimpanzees B) humans and chimpanzees probably shared a recent a common ancestor C) chimpanzees must have single-stranded DNA D) humans and

Which of the following could result in secondary succession? a. the formation of a tall sand dune on a previously grassy beach b. a vast glacier in motion forming a U-shaped valley on its wake c.

One species evolves over millions of years to become two different but closely related species

Molten materials cool at different rates. Which property of a mineral does this affect? color luster crystal size crystal shape

What is unique about dogs?

3. The best thing you can do to keep a positive relationship with your supervisor is to

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