In the lab, students are working with substances that could cause burns. Which of these safety precautions is MOST important to follow? Select one:

a. Empty all sinks.

b. Wear eye protection.

c. Turn electrical equipment off.

d. Check that glassware is clean.

Which is it a characteristic of the animal kingdom? a. they include both vertebrates and invertebrates b. their skin is covered with hair or fur c. they are heterotrophs d. they are eukaryotic

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?