*Question*
Q: Phylum chordata consists of two subphyla of invertebrates, as well as the hagfishes and what else?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - lipids  - organs  - cells  - vertebrates   A:
**Answer**
vertebrates

*Question*
Q: What type of science is the study of matter and energy and includes chemistry and physics?   Read this paragraph and choose the correct option from the provided answers:  Physical science is the study of matter and energy. It includes chemistry and physics.   Choices:  - biology  - Earth science  - genetics  - physical science   A:
**Answer**
physical science

*Question*
Q: Which part of an earthquake is in the ground where the ground breaks?   Read this paragraph and choose the correct option from the provided answers:  The focus of an earthquake is in the ground where the ground breaks. The epicenter is the point at the surface just above the focus.   Choices:  - the epicenter  - the tectonic plate  - the fault  - the focus   A:
**Answer**
the focus

*Question*
Q: What is the process in which organ systems work to maintain a stable internal environment?   Read this paragraph and choose the correct option from the provided answers:  The process in which organ systems work to maintain a stable internal environment is called homeostasis. Keeping a stable internal environment requires constant adjustments. Here are just three of the many ways that human organ systems help the body maintain homeostasis:.   Choices:  - ketosis  - homogeneity  - organ balance  - homeostasis   A:
**Answer**

homeostasis