"new caledonian crows consume a wide range of foods. these crows require tools to extract the larvae of wood boring beetles from their burrows. a bird pokes a larva with a stick until the larva is disturbed enough to bite the stick and hang on to it. the bird is then able to pull the larva out of its burrow. these larvae, with their unusual diet, have a distinct chemical that can be found in the feathers and blood of crows—allowing scientists to determine the percentage of the crows’ diet that is made up of beetle larvae. scientists found that the beetle larvae are so energy-rich that just a few could satisfy the daily energy requirement for a crow. the crows with the greatest skill in using a twig as a tool benefit most in terms of nutrition.
state one reason why the offspring of crows skilled at using twigs as tools would have the greatest chance of survival
state one reason why some members of a population of crows equally skilled in the use of twigs have different rates of survival."
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Biology, 21.06.2019 16:30
Most of earth’s fresh water is found in oceans and seas stored in glaciers and ice caps groundwater stored beneath the surface found in lakes, rivers, streams, and reservoirs
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Biology, 22.06.2019 02:00
Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.
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Biology, 22.06.2019 11:30
What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.
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Biology, 22.06.2019 18:30
Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports
Answers: 1
"new caledonian crows consume a wide range of foods. these crows require tools to extract the larvae...
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