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mrs_skeptik [129]
3 years ago
13

Which evolutionary mechanism caused the increase in dark-colored Biston betularia moths in England in the 1800s? genetic drift n

atural selection overproduction gene flow
Biology
1 answer:
SashulF [63]3 years ago
3 0

Answer:

Natural Selection is an evolutionary process that caused the increment of dark-coloured Biston betularia moths in England. It happened due to increase of air pollution in the industries. The bark of the trees became darker because of the deposition of pollutants.

In order to save itself from predators, the species of Biston betularia evolved itself to a dark coloured species so that the predators gets confused between the bark of the tree and the Biston betularia.

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How many grams of the compound in the figure above are required to make 1 liter of a 0.5 M solution? (Note: The atomic masses, i
Dafna1 [17]

Answer:

This question is incomplete as there is no figure in the question but the compound in the figure is Ethanoic acid (CH3COOH). Hence, we can calculate the mass.

The answer is: 30grams

Explanation:

According to the question, the volume of the compound (CH3COOH) is 1litre while the molar concentration is 0.5M

Molarity or Molar concentration is calculated using the formula:

M= n/V

Where; M= Molarity (M) = 0.5M

n= number of moles (mol)

V= Volume (V) = 1L

Hence, number of moles (n) = M × V

n = 0.5 × 1

n = 0.5 moles.

To calculate the mass in grams of CH3COOH, we say;

Number of moles (n) × molar mass (MM)

Since atomic mass for (C= 12, H= 1 and O=16)

Molar mass of CH3COOH:

= 12 + 1(3) + 12 + 16 + 16 + 1

Molar mass of CH3COOH = 60g/mol

Mass (in grams) of CH3COOH = 0.5 moles × 60g/mol

Mass = 30grams.

Therefore, 30grams of CH3COOH compound are required to make 1 liter of a 0.5 M solution.

6 0
3 years ago
Why do fungi release enzymes from there tips?​
lapo4ka [179]

Answer:

They absorb the food molecules that result from the external digestion.

Explanation:

6 0
2 years ago
The stalk that connects the leaf to the stem
defon
The answer is petiole. Hope this helps!!!
4 0
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Order these steps of the lytic cycle. A. Assembly B. Penetration C. Lysis D. Synthesis E. Adsorption
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Answer:

The correct order is

E. Adsorption

B. Penetration

D. Synthesis

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The third step is synthesis, in this stage, the viral genome gets incorporated and produces viral proteins required for capsid formation. The fourth step is assembly in which viral protein assembled around viral nucleic and form new viruses.  

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3 0
3 years ago
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wel
SSRI stands for S<span>elective Serotonin Reuptake Inhibitor and it is a type of antidepressant medication.  These medications are used to treat depression, and have fewer side effects than other medications. 
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