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REY [17]
3 years ago
14

What is a gene?

Biology
1 answer:
Ilya [14]3 years ago
7 0
The right answer is: D)
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Why would the tissues of a leaf need to have the ability to resist changes in pH in their natural environment?
Anastaziya [24]

Answer:

The tissues of a leaf needs to have the ability to resist changes in their natural environment so that they can survive

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Que significa hostilidad??​
Amiraneli [1.4K]

Answer:

Hello it could mean unfrienliness

similar could be hatred

Explanation:

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¿Cuáles son los tres tipos de trabajo que realizan los seres vivos en los que emplean la energía química útil?
Alja [10]
Qué significa tener energía? Bueno, piensa en cómo te sientes cuando despiertas por la mañana.
7 0
3 years ago
Determine the new concentration, in mg/mL, of the starch solution you diluted in the Erlenmeyer flask. Recall from the Procedure
Semmy [17]

Answer:

0.05 mg/mL  ( B )

Explanation:

Given data:

20 mg/ml starch

2% solution = 2g of solute is in 100g of solvent

<u>Determine the new concentration in mg/ml </u>

Dilution equation = C1V1 = C2V2

new concentration ; applying the dilution factor

dilution factor = 1 : 400 ; ( 2 /400 )g = 0.005 g of solute is present in every  100 mL

∴ new concentration = 0.00005 g / 1 mL * ( 1000 mg / 1g ) = 0.05 mg/mL

6 0
3 years ago
A virus is combined with a host cell in molten nutrient agar and then poured over a sterile nutrient agar plate. After the agar
maria [59]

Answer:

The correct answer is B. The virus can infect the host.

Explanation:

  • As the host and the virus both remain in the agar plate, the virus is capable of infecting the host cells.
  • The host cell multiplies and grows by utilising the nutrient from the agar medium.
  • After the virus particles infect the host, they replicate inside the host and produce new progeny virions which get released out of the host cell by killing it.
  • The newly formed virions infect other host cells and the process continues.
  • The killing of the host cells by the viruses result in the generation of clear zones on the agar plate which is also known as the zone of exclusion.
  • In the zone of exclusion region, the host cells have been killed by the viruses.

4 0
3 years ago
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