*Question*
Q: Wich disorder arises when defective valves allow blood to accumulate within the veins? Choices: - vascular disease - bulging veins - cataracts veins - varicose veins A:
**Answer**
varicose veins

*Question*
Q: What is the term for the gases that surround a planet? Choices: - hemisphere - galaxy - biosphere - the atmosphere A:
**Answer**
the atmosphere

*Question*
Q: The body does not exist in isolation. there is a constant input of water and electrolytes into the system. while osmoregulation is achieved across membranes within the body, excess electrolytes and wastes are transported to the kidneys and excreted, helping to maintain this? Choices: - physical balance - vacuum balance - nucleic balance - osmotic balance A:
**Answer**
osmotic balance

*Question*
Q: The human genome has how many more alu elements than the chimpanzee genome? Choices: - six times - ten - two times - three times A:
**Answer**
three times