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katrin2010 [14]
2 years ago
12

What are sponges? but I need help.

Biology
1 answer:
posledela2 years ago
3 0

Answer:

Explanation: Sponges are animals with dense skeletons that are highly adapted to their environments.

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Witch of the following is also known as the hydrologic cycle?
olga2289 [7]

Answer:

A. Water cycle

Explanation:

The clue is in the name : hydrologic. Hydro- is the prefix for water: think hydroponics, hydrogen, hydro flask :)

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3 years ago
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What happens to the force of gravity between two masses if one mass is decreased
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A student argues that being separated geographically is the only way for speciation to occur. Why is he wrong?
Mashutka [201]
Causes of speciation
<span>Geographic isolation
In the fruit fly example, some fruit fly larvae were washed up on an island, and speciation started because populations were prevented from interbreeding by geographic isolation. Scientists think that geographic isolation is a common way for the process of speciation to begin: rivers change course, mountains rise, continents drift, organisms migrate, and what was once a continuous population is divided into two or more smaller populations.

</span>Reduction of gene flow
<span>However, speciation might also happen in a population with no specific extrinsic barrier to gene flow. Imagine a situation in which a population extends over a broad geographic range, and mating throughout the population is not random. Individuals in the far west would have zero chance of mating with individuals in the far eastern end of the range. So we have reduced gene flow, but not total isolation. This may or may not be sufficient to cause speciation. Speciation would probably also require different selective pressures at opposite ends of the range, which would alter gene frequencies in groups at different ends of the range so much that they would not be able to mate if they were reunited.</span>
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3 years ago
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*will give brainliest!*<br><br> Why is the biosphere so fragile?
icang [17]
I believe the biosphere is fragile, because over time all of the pollution us humans have made; If its from air pulloution, acid rain or even water pollution. the toxic acids over time have made the biosphere and the ozon layer weaker and more thin. which causes the biosphere to become weaker.
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Stored energy is called energy, and movement is called energy.
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Kinetic is movement and potential is stored energy
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3 years ago
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