A number of different vertebrates have adaptations for diving. For example, the structure of the cardiovascular and respiratory system of amphibians (frogs/salamanders) allows them to bypass their unventilated lungs. Compare the structure of the amphibian respiratory and circulatory systems to that of humans and explain how the organization of the amphibian’s circulatory and respiratory system are adapted to diving.

In the desert there are plants that have adapted to the sparse rainfall by evolving mechanisms...

In the desert there are plants that have adapted to the sparse rainfall by evolving mechanisms to store water. Cactus are an example of such a plant. You are studying a particular species of cactus in an area of desert that is 100 km^2. In your designated area of study you have counted 175 plants. What is the density of this type of cactus in terms of plants per square kilometer? 571.4 plants/km^2 0.571 plants/km^2 1.75 plants/km^2 0.00175 plants km^2...

“Larger hospitals in South Florida display higher readmission rates and thus lower quality of care compared...

“Larger hospitals in South Florida display higher readmission rates and thus lower quality of care compared to smaller hospitals.” A). Identify the implied dependent and independent variables. B). Does the headline demonstrate a positive or negative correlation between the two? C). Is there a plausible mechanism (confounding factor) through which we could explain why the independent variable has a causal impact on the outcome? D). Now try to think of reasons why this could be a spurious relationship instead and...

Mammals, birds and insects have the ability to produce urine that is hyperosmotic to their bodily...

Mammals, birds and insects have the ability to produce urine that is hyperosmotic to their bodily fluid; however, insects utilize a more simplistic mechanism. In addition to the final product being the same, there are other stages of urine formation in mammals and insects that is quite similar. Explain

Sex determination in Mammals. You have identified a gene that you have named “mont1” (for ‘make...

Sex determination in Mammals. You have identified a gene that you have named “mont1” (for ‘make ovaries not testes’) that is expressed at the time when the bipotential gonad becomes specified to become an ovary. Because of this “show it” evidence that mont1 is expressed in the right place at the right time, you hypothesize that mont1 is a critical regulator of the female primary sex determination pathway to specify ovary development. From what you know about the primary sex...

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