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DerKrebs [107]
3 years ago
14

Please help me with my homework

Biology
2 answers:
viva [34]3 years ago
8 0
1. Solar planet
2. Sun
3.planet
4. Orbit
5. Moon
6. Asteroid
7. Comet
8. Gas giant
9. Dwarf planet
tatiyna3 years ago
5 0
1. Solar system
2. sun
3. planet
4.orbit
5.moon 
6.Asteroid
7.Comet
8.gas giant
9.dwarf planet

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_____are specialized photoreceptors that work well in low light conditions.
Aleksandr [31]

Answer:

Rods

Explanation:

Rods are specialized photoreceptors that function best in low-light conditions. They are a major part of our vision in dimly lit environments, as well as our perception of movement in our peripheral vision.

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3 years ago
How do scientists explain the discovery of crinoids in the Wasatch Mountains?
Nostrana [21]
<span>The mountains were once seas. The land was forced up by tectonic motion when the mountains were formed. The Sahara also used to be a sea and has a valley full of the fossilized remains of an extinct species of whale. It is generally agreed upon that two plates colliding caused the uplift that created the mountainous zone. Same for the Himalayas.</span>
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3 years ago
Which do you think would adapt and survive overtime to a mass extinction? A starfish or an eel?
Harlamova29_29 [7]

Answer:

Starfish

Explanation:

This is an opinion questions, so there really isn't a right or wrong answer.  You could just as easily choose Eel.  Your task is to pick one and defend your reasoning.

I chose starfish because starfish have a long history of demonstrated adaptability to a wide variety of conditions.  Their armored skin protects them from a variety of predators, as does the poison that many of them contain.  They have the ability to regrow limbs, and even regrow entire starfish from certain body parts.  When it comes time to breed, starfish meet together in groups.  Each female releases a few million eggs from the gonads in each of her arms.  Each male then releases billions of sperm from each gonad in each of his arms, thus covering the eggs with sperm to fertilize them.

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2 years ago
What are four characteristics of a good extraction solvent?
ella [17]

A good extraction solvent should have a strong solubilizing capability for the compound of interest, it should be immiscible or only weakly misciblewith the matrix solvent ( the first solution or mixture containing the compound from its natural source, e.g., water/ether. water/ chloroform, etc. If possible the extraction solvent should be non-flammable, non-toxic or of low toxicity, reasonably volatile, and of low eco-impact. Inexpensive and available, of high purity , and shelf stable. If one is determining the compound of interest by UV/Vis spectrophotometry or fluorescence, the solvent should have extremely low absobance or emission at the wavelength of analysis

• high solubility for the solute and low solubility for the carrier liquid.

• density difference vs. the carrier liquid greater than 150 kg/m. ...

• mid-level interfacial tension (5–30 dyne/cm)

• high resistance to thermal degradation.


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3 years ago
Why is it not possible to completely convert thermal energy into mechanical energy
MAXImum [283]
The second law of thermodynamics is a statement of the law of conservation of energy say that heat cannot be completely converted into mechanical energy  
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