Problem:OPTIONS:
- magnifying glass
- electronic scale
- telescope
- electron microscope

Q: Scientists did not actually see viruses until what was invented? A:
****
A: electron microscope

Q: How do dogs lose body heat? A:
OPTIONS:
- barking
- sweating
- eating
- panting
panting

Q: What is the sugar that the cells of living things use for energy? A:
OPTIONS:
- insulin
- sucrose
- chlorophyll
- glucose

Answer: glucose

Question: Q: Sex-linked traits are located on genes on what chromosomes? A:
OPTIONS:
- reactive
- neural
- dna
- sex
Answer: sex

input with options: Q: Blood from the body enters what chamber of the heart before it is pumped to the right ventricle and then to the lungs? A:
OPTIONS:
- left ventricle
- left bivalve
- left atrium
- right atrium
output: right atrium

Problem: OPTIONS:
- digestive system
- circulatory system
- cardiovascular system
- skeletal system
Q: Q: Fractures, osteoarthritis, and rickets are problems of which body system? A:
Answer:
skeletal system