Problem: OPTIONS:
- the moon
- earth
- the Kuiper Belt
- the sun
Q: Q: What is at the center of our solar system? A:
Answer: the sun

Problem:OPTIONS:
- catabolic steroids
- progesterone
- estrogen
- anabolic steroids

Q: What performance-enhancing drugs are synthetic versions of the male sex hormone, testosterone? A:
****
A: anabolic steroids

Q: What class are centipedes and millipedes in? A:
OPTIONS:
- xerophyte
- spirogyra
- terapoda
- myriapoda
myriapoda

Q: Mutations that lead to cancer usually occur in genes that control the cell cycle. these include tumor-suppressor genes and what? A:
OPTIONS:
- extinction - oncogenes
- apparition - oncogenes
- Darkness Oncogenes
- proto-oncogenes

Answer: proto-oncogenes

Question: Q: What branch of science aims to understand all about our planet and its environments? A:
OPTIONS:
- biology
- immunology
- petrology
- earth science
Answer: earth science

input: OPTIONS:
- gravity
- prolonged drought conditions
- run-off from flooding
- because soil and rocks are porous Now, answer this question: Q: Why does water infiltrate the ground? A:
A:
output:
because soil and rocks are porous