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Sati [7]
3 years ago
5

Darwin called this idea of certain traits being selected in order for an organism to reproduce sexual selection. In crickets and

frogs, males call to attract mates and females are attracted to superior males by characteristics of their calls. How can this also be a disadvantage to survival of the species? A) Only the superior male traits are passed to the next generation. B) Female choice for mating reflects only the genes of the superior males. C) Calling can be hazardous because it also attracts parasites and predators. D) Inferior males intercept the females from the superior males and mate anyway.
Chemistry
2 answers:
tamaranim1 [39]3 years ago
7 0

Th correct answer is option C. Calling can be hazardous because it also attracts parasites and predators.

The mating call is used by the males to attract females for sexual reproduction. By using vocal sounds males are not only making themselves attractive to females, they are also making themselves vulnerable to predators.

Thus the mating call can have a disastrous effect on the survival of the species.

gogolik [260]3 years ago
5 0

Answer: C.

Calling can be hazardous because it also attracts parasites and predators.

Explanation:

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The lower the ignition temperature, better the fuel. True or false?Why?
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Answer:

True

Explanation:

This means the fuel is highly flammable hence it has a low ignition temperature. This, therefore, means it burns fast without putting in a lot of energy to ignite it. Even in cars, therefore, the compression ratios, in engines using these of these fuels, is lesser.

3 0
4 years ago
explain why it is easier to separate a solid from another solid compared to a liquid from another liquid
makkiz [27]

Answer:

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4 0
3 years ago
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Umnica [9.8K]
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4 0
3 years ago
A sample of unknown hydrate, AC-XH20, has a mass of 1.000 g before heating and a
KIM [24]

Answer:

The water of crystallization for the formula of the unknown  hydrate is 2.

Explanation:

Mass of an unknown hydrate = 1.000 g

Molar mass of hydrate = 195.5 g/mol

MOles of unknown hydrate =\frac{1.000 g}{195.5 g/mol}=0.00512 mol

Mass of hydrate after heating = 0.781 g

Mass of water lost due to heating = x

1.000 g = 0.781 g + x\\x = 1.000 g - 0.781 g = 0.219 g

Moles of water lost =\frac{0.219 g}{18.01528 g/mol}=0.0122 mol

AC.xH_2O+Heat\rightarrow AC+xH_2O

1 Mole of hydrate has x moles of water and 0.00512 moles of hydrate has 0.0122 moles of water then we can write:

\frac{1 }{x}=\frac{0.00512 }{0.0122 }\\x\approx 2

The water of crystallization for the formula of the unknown  hydrate is 2.

7 0
3 years ago
What is the osmotic pressure in atm of
Dmitrij [34]

Answer:

12.2329 atm

Explanation:

Applying

PV = nRT.................... Equation 1

Make P the subject of the equation

P = (n/V)RT................ Equation 2

Where P = Osmotic pressure, (n/V) = Molarity of urea, T = Temperature, R = molar gas constant.

From the question,

Given: (n/V) = 0.5 M, T = 25°C = (273+25) = 298 K, R = 0.0821 Latm/mol.K

Substitute these values into equation 2

P = (0.5)(298)(0.0821)

P = 12.2329 atm

5 0
3 years ago
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