*Question*
You are presented with the question "What helps ferns in reproduction?" and the following answer choices:  - cell wall  - Fruits  - wind  - pollen  - sun  - seeds  - nectar  - earthquakes  Now knowing that spores may be dispersed by moving water, wind, or other organisms and ferns reproduce by spores, choose the best answer.
**Answer**
wind

*Question*
You are presented with the question "What gives a rusty red color to sedimentary rocks?" and the following answer choices:  - food coloring  - The area was once underwater  - chemical weathering  - remains of prehistoric life  - deoxyribonucleic acid  - sea urchins  - dirt  - earthquakes  Now knowing that chemical weathering causes iron in rock to oxidize and iron oxide gives a rusty red color to sedimentary rocks, choose the best answer.
**Answer**
chemical weathering

*Question*
You are presented with the question "Irradiating food can be used to kill what in the food?" and the following answer choices:  - 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  Now knowing that irradiating food can be used to kill existing microorganisms in the food and fermentation occurs through the action of microorganisms in the large intestine, choose the best answer.
**Answer**
Something that causes fermentation

*Question*
You are presented with the question "Some aviary species fly and others swim but, all endothermic tetrapod vertebrates share what trait?" and the following answer choices:  - warm-blooded  - Weight  - fur and fat  - sweating  - Epidermis  - feathers  - retina  - four limbs  Now knowing that birds are endothermic tetrapod vertebrates and some birds fly and some birds swim, but all birds have feathers, choose the best answer.
**Answer**

feathers