Problem: OPTIONS:
- circulatory system
- digestive system
- cardiovascular system
- nervous system
Q: Q: The processes of homeostasis and temperature control are centered in the hypothalamus of the advanced animal brain, thus thermoregulation depends on what organ system? A:
Answer: nervous system

Problem:OPTIONS:
- blue elliptical galaxies
- giant orbital galaxies
- giant gaseous galaxies
- giant elliptical galaxies

Q: Which type of galaxies contain very little gas and dust, are red to yellow in color, contain over a trillion stars and have mostly old stars? A:
****
A: giant elliptical galaxies

Q: What types of bonds hold together positive metal ions and their valence electrons? A:
OPTIONS:
- ionic bonds
- covalent bonds
- toxic bonds
- metallic bonds
metallic bonds

Q: What covers the body of a fish to help the move their body to swim? A:
OPTIONS:
- gelatin
- skin
- hairs
- scales

Answer: scales

Question: Q: Each vertebral vein also flows into which vein? A:
OPTIONS:
- trichina
- xerophyte
- spiral
- brachiocephalic
Answer: brachiocephalic

input: OPTIONS:
- symmetrical structures
- matching structures
- Identical structures
- analogous structures Now, answer this question: Q: Due to similar function, the wings of bats and birds are referred to as what type of structures? A:
A:
output:
analogous structures