Which of the statements is true of reflexes?

A. All reflex signals must go to the brain.

B. They require conscious thought.

C. They are slow and gradual responses.

D. They are involuntary.

A person eats food prepared on a kitchen counter covered with living infectious bacteria. Which of the following best describes an example of how the bacteria might resist the person's nonspecific immune defenses?

What chemical property must argon have to make it a suitable choice?

What happens to ideas in science? A. they do not often influence the way people live their lives. B. they become theories that no one is allowed to question. C. they get modified or replaced as new ones are developed. D.

A university received national recognition for discovering an ancient civilization in Africa. To gain access to the site, dig up the remains, study the civilization and its artifacts, and properly store the items, the university called on a team of

Name three pond populations that could not survive in a forest ecosytem? and name three forest populations that could not survive in pond ecosystem?

Li was experiencing fatigue, despite sleeping eight hours per night. He went to the doctor and was diagnosed with iron-deficiency anemia. The doctor recommended he eat iron-fortified breakfast cereals.

Describe the water that is most likely to float on the surface of the ocean.

Bryophytes are known as non-vascular plants. what makes them non-vascular?

If a person eats hurriedly and barely choose his food before swallowing it what effect will that likely have on his stomach?

What makes a living thing living?