Amino acids that the body can never synthesize are called

What would happen to a plant in a severe drought

The heaviest naturally occurring element is

Which of these choices best describes what a ratio shows?

Place the objects in order from least greatest mass to greatest mass terrestrial gas giant Ice dwarf Ice giant

Which of the following is always an important part of an experiment? 1. making a working model 2. observing things in nature 3. making drawings of things observed 4. identifying and controlling variables

What are the possible effects of contaminated water on the health of an individual or community? Explain your answer in terms of what causes the contamination, the types of infectious agents involved in the related diseases, and how these diseases

When a mass increases, its gravitational force A. Increases B. decreases C. stays the same

Colpidium colpoda is a unicellular eukaryote that lives in freshwater, eats bacteria, and moves by cilia (see Figure 6.23b). Describe how the parts of this cell work together in the functioning of C.

Which statements apply to density? Check all that apply. >Density is a chemical property of an object. >The density of an object is constant. >Density is a derived unit of measure. >Density is the sum of the mass and volume of an object.

For some invertebrates that live in water, the sense of taste and the sense of smell are identical. Why do you think separate organs for taste and smell might have evolved in animals that live on land but not in some animals that live exclusively in