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For example, adaptive behavior is a mechanism of population stabilization. [23] In natural communities, organisms are able to interact with each other creating complex food webs and predator-prey dynamics. Adaptive behavior helps modulate the dynamics of feeding relationships by having a direct effect on their feeding traits and strategies. [23]
Archaeopteryx was the first fossil to display both clearly traditional reptilian characteristics—teeth, clawed fingers, and a long, lizard-like tail—as well as wings with flight feathers similar to those of modern birds. It is not considered a direct ancestor of birds, though it is possibly closely related to the true ancestor.
Birds' hearts and brains, which are very sensitive to arterial hypoxia, are more vascularized compared to those of mammals. [72] The bar-headed goose ( Anser indicus ) is an iconic high-flyer that surmounts the Himalayas during migration, [ 73 ] and serves as a model system for derived physiological adaptations for high-altitude flight.
Adaptive traits are those that produce more copies of the individual's genes in future generations. Maladaptive traits are those that leave fewer. For example, if a bird that can call more loudly attracts more mates, then a loud call is an adaptive trait for that species because a louder bird mates more frequently than less loud birds—thus ...
The adaptive traits may be structural, behavioural or physiological. Structural adaptations are physical features of an organism, such as shape, body covering, armament, and internal organization. Behavioural adaptations are inherited systems of behaviour, whether inherited in detail as instincts, or as a neuropsychological capacity for learning.
Fallen leaves are perfect nesting sites for native bees, moths and butterflies. “It’s a place for them to basically tuck away and get through the winter until spring,” says Bills.
And by the birds and the bees, I’m referring to climate change and its effect on plants and animals and people around the world. We need to address it head on.
Convergent evolution—the repeated evolution of similar traits in multiple lineages which all ancestrally lack the trait—is rife in nature, as illustrated by the examples below. The ultimate cause of convergence is usually a similar evolutionary biome , as similar environments will select for similar traits in any species occupying the same ...