Earth's crust is generally divided into older, thicker continental crust and younger, denser oceanic crust..The crust is made of solid rocks and minerals.

The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up 84% of Earth's total volume.

The core lies beneath the cool, brittle crust and the mostly-solid mantle. ... Earth's core is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle.1

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3 years ago

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the eastern kingbird hunts by catching flying insects in mid-air, an approach which requires impressive and energetic acrobatic

tangare [24]

It is safe to assume that the eastern kingbird will have a type 2 functional response to an increase in prey abundance.

The functional response, in ecology, is a data-based description of the behavior of certain animals' consumption rates in response to a change in prey density. This can be of three kinds:

Type 1: An increase in consumption
Type 2: A decrease in consumption
Type 3: Decreased consumption, followed by a quick increase.

The Eastern kingbird is likely to follow a type 1 functional response to the presence of more prey. The reason for this, aside from it being the most common response, is that the eastern kingbird consumes insects, which do not provide a great amount of energy, in a way that consumes much energy. Therefore it is logical to assume that the kingbird will consume more prey to better sustain its rigorous feeding habits.

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3 years ago

Which trophic level is most vulnerable to extinction?

lara [203]

Answer:

c. secondary consumer level

Explanation:

Most secondary extinctions are due to direct bottom‐up effects: consumers go extinct when their resources are lost. Secondary extinctions due to trophic cascades and disruption of predator‐mediated coexistence also occur.

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