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slega [8]
3 years ago
9

Which activity is an example of a chemical change?

Biology
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

An old penny rusting

Explanation:

A penny forming rust is the penny being chemically altered and changing form as opposed to dissolving sugar in water, which is still sugar, just mixed with water. It doesn't change the chemical makeup of the water or sugar.

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The frequency of autosomal alleles K and k in a large population of snails is 0.6 and 0.4. What is the approximate genotypic fre
Flura [38]

Answer:

Option (b).

Explanation:

The frequency of alleles K and k in population are 0.6 and 0.4. The inbreeding coefficient is 0.3.

The heterozygote frequency can be calculated by the formula:

F = \frac{2Kk-H}{2Kk}

Here, K = 0.6, k= 0.4, F = 0.3 and H = approximate genotypic frequency of heterozygote Kk.

Put the values in the above formula

0.3 = \frac{2\times2\times0.6\times0.4-H}{2\times0.6\times0.4}

H = 0.36 ≈ 0.34.

Thus, the approximate genotypic frequency of the heterozygote Kk is 0.34.

Hence, the correct answer is option (b).

5 0
3 years ago
A species of finch has been studied on one of the geographically isolated Galapagos Islands for many years. Since the island is
emmainna [20.7K]
B) Inherited some advantageous variations
7 0
3 years ago
24 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
GarryVolchara [31]
No, the distance from the last stop..... or c
7 0
3 years ago
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Which of the following outcomes is observed during Rabies virus pathogenesis?
Digiron [165]

Answer:

c) Negri bodies are a diagnostic sign of Rabies virus infection.

Explanation:

Rabies is an infection caused by rabies virus which affects the neurons and causes inflammation of the brain. It is a deadly disease and many animals are carriers of this disease like dogs, cats, raccoons, wolf, bats, fox, etc.  

It is diagnosed by the presence of Negri bodies in the cytoplasm of nerve cells. Negri bodies are inclusions that are round or oval shapes having a size between 0.25 to 27 μm. Negri bodies can be frequently diagnosed in Purkinje cells of the cerebellum and pyramidal cells of Ammon’s horn.  

Apart from these cells, they can be found in various ganglia, neurons of the tongue and other organs. So the correct answer is c.

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3 years ago
Explain why flowers are important to a plant ?
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Because they are reproductive organs of a plant

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