Specialization occurs when competing species evolve different adaptations, and most species are highly specialized for their environments and evolve as the environments change. Given these facts, specialization occurs when competing creatures evolve as the what among the following options: - habitats grow - salamanders - animals develop - times change - It helps them survive - principals of aerodynamics - environments change - remains of prehistoric life
environments change

Fertilization takes place inside the female organism, and each eyed egg is a fertile egg. Given these facts, what do female organisms produce among the following options: - honey - electricity - apples - nectar - plants - eggs - anger - adults
eggs

Q: Nitrogen is found in proteins, nucleic acids, and chlorophyll, and most molecules are proteins or nucleic acids. Given these facts, _ is found in most molecules. among the following options: - glucose - Gold - Energy - food - Polonium - Nitrogen - Helium - heat energy
A: Nitrogen

Question: Blood pH may become unbalanced if the rate of breathing is too fast or too slow, and breathing is regulated to keep as normal as possible arterial blood pH and PO2. Given these facts, what is regulated by breathing among the following options: - thirst - air pressure - blood flow - body water - Energy - Chemical energy - Decibels - kinetic energy
Answer: blood flow

*Question*
Abreathing mask is used for keeping harmful particles from entering the respiratory system, and all smoke is harmful to the respiratory system. Given these facts, what keeps smoke out of the respiratory system among the following options: - Cooking - Masks - Glasses - skin - Gloves - Hats - Urea - oxygen
**Answer**
Masks

Carbon monoxide is a gas produced by furnaces and other devices that burn fuel, and carbon monoxide can kill. Given these facts, burning fuel in a furnace can among the following options: - fire interns - kill - death - furnish a home - freeze water - harm - loss - expand
kill