*Question*
Lung cancer is most often caused by exposure to tobacco smoke, and many patients with lung cancer also have emphysema. Given these facts, emphysema is often cause by exposure to: among the following options: - high temperature - fog - Greenhouse gasses - rays or beams - hot steam - tobacco smoke - Pollution - incendiary people
**Answer**
tobacco smoke

*Question*
Organs of excretion make up the excretory system, and urinary system Excretory system removes waste and toxic substances from blood. Given these facts, what removes waste from the blood among the following options: - Veins and arteries. - alleles - Leptospirosis - the spinal cord - Special disposal - an area swollen with pus - oxygen - organs of excretion
**Answer**
organs of excretion

*Question*
Phytoplankton are bacteria and algae that use sunlight to make food, and phytoplankton, or plant plankton, needs sunlight to live, the same way plants on land do. Given these facts, what does plant plankton need for food among the following options: - Sunlight - chemicals - glucose - warmth - Bodily water - photons - The Sun - Energy
**Answer**
Sunlight

*Question*
Flowers produce spores that develop into gametophytes, and all gametophytes are haploid. Given these facts, flower spores eventually develop into an entity that is: among the following options: - sperm - fertile - mammalian - ferns - fungi - development - haploid - plants
**Answer**
haploid