
Concept explainers
To determine:
The justification for the fact that it is impossible to use all of the air in a space in contrast to the fear of the claustrophobic person.
Introduction:
Air is a mixture of gases like nitrogen, oxygen, carbon dioxide, and many more are present in the air. These gases are present in a definite proportion. Alteration in the proportion of gases is known as pollution.
To determine:
The changes in the air when an individual respire and whether these changes are dangerous or not.
Introduction:
Respiration is the biological process including inhaling of fresh air, oxidation of food in the presence of air and exhaling the foul air from the body. Inhaling and exhaling of air together called breathing or external respiration.

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Chapter 27 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
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- Select all of the following that the ablation (knockout) or ectopoic expression (gain of function) of Hox can contribute to. Another set of wings in the fruit fly, duplication of fingernails, ectopic ears in mice, excess feathers in duck/quail chimeras, and homeosis of segment 2 to jaw in Hox2a mutantsarrow_forwardSelect all of the following that changes in the MC1R gene can lead to: Changes in spots/stripes in lizards, changes in coat coloration in mice, ectopic ear formation in Siberian hamsters, and red hair in humansarrow_forwardPleiotropic genes are genes that (blank) Cause a swapping of organs/structures, are the result of duplicated sets of chromosomes, never produce protein products, and have more than one purpose/functionarrow_forward
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