Birds Never Developed an Internal Placental System but Are Confined

question 59

Essay

Birds never developed an internal placental system but are confined to laying eggs.Consider the many physiological burdens and limitations imposed by bearing live young,and then consider all of the adaptations of birds for flight.Given that birds arose from dinosaur-like ancestors that also laid eggs,but birds managed to evolve a high metabolism and other specialized features,discuss one physiological reason that probably limits birds from ever evolving viviparity.

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Definitions:

Northern Winter Conditions

Specific environmental conditions characterized by extreme cold, snow, and ice, affecting vehicles and equipment operation.

Operating Leverage

The degree to which a firm can increase operating income by increasing revenue, indicating the proportion of fixed versus variable costs.

Depreciation Expense

The methodical distribution of a physical asset's cost throughout its lifespan, accounting for depreciation or becoming outdated.

Operating Cash Flow

The cash generated from the normal operating activities of a business, reflecting its ability to generate sufficient cash to fund its operations.