*Question*
Spores may be dispersed by moving water, wind, or other organisms, and ferns reproduce by spores. Given these facts, what helps ferns in reproduction among the following options: - cell wall  - Fruits  - wind  - pollen  - sun  - seeds  - nectar  - earthquakes
**Answer**
wind

*Question*
Chemical weathering causes iron in rock to oxidize, and iron oxide gives a rusty red color to sedimentary rocks. Given these facts, what gives a rusty red color to sedimentary rocks among the following options: - food coloring  - The area was once underwater  - chemical weathering  - remains of prehistoric life  - deoxyribonucleic acid  - sea urchins  - dirt  - earthquakes
**Answer**
chemical weathering

*Question*
Irradiating food can be used to kill existing microorganisms in the food, and fermentation occurs through the action of microorganisms in the large intestine. Given these facts, irradiating food can be used to kill what in the food among the following options: - Something that causes attraction  - one celled organisms  - Something that causes fermentation  - Something that causes digestion  - microscopic building blocks  - single-celled organisms  - Microscopic organisms  - Something that causes evaporation
**Answer**
Something that causes fermentation

*Question*
Birds are endothermic tetrapod vertebrates, and some birds fly and some birds swim, but all birds have feathers. Given these facts, some aviary species fly and others swim but, all endothermic tetrapod vertebrates share what trait among the following options: - warm-blooded  - Weight  - fur and fat  - sweating  - Epidermis  - feathers  - retina  - four limbs
**Answer**

feathers