Which of the following is an example of a mixture?

OA. calcium

OB. the atmosphere

OC. carbon dioxide

OD. water

1. Cells that protect the body by engulfing foreign cells or producing antibodies are A. Red blood cells B. Cilia C. Platelets D. White blood cells 2. The circulatory system includes the A. Lungs, heart, and brain B.

Jayden has been asked to wear a protective vest while his dentist takes an X-ray. Why is this? X-rays are dangerous mutagens. X-rays are considered poisonous. X-rays are harmful chemicals X-rays are a result of UV radiation,

Explain how some heterotrophs could be described as either a primary consumer or a secondary consumer.

Scientists are analyzing the movement patterns of slime mold, which grows outward to search for its food sources by retracting from everything but the most efficient route, in an effort to better understand how to optimize traffic patterns.

What type of bone marking enables these bones to fit together to form a joint

The Sun heats the Earth's water. This warm water turns into a vapor, and rises into the atmosphere, where it cools off. What happens to this water vapor? A. The water vapor evaporates and escapes into space. New water is formed by precipitation. B.

Which of the following could cause only a physical change in a hamburger patty Cooking it Eating it Cutting it in half Letting it rot

You are studying a new species of plant similar to Mendel's pea plants. You are specifically interested in two genes that are located on two different chromosomes. In this plant, the gene for height has two alleles, T (tall) and t (short).

Why are we unable to hear sound in outer space

Alligators, crocodiles, and snakes are all reptiles. however, alligators are more closely related to snakes. which statement most accurately describes how this relationship is explained in Darwin's theory of evolution