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seropon [69]
3 years ago
5

What is the fastest way to administer nicotine to the brain?

Biology
1 answer:
Agata [3.3K]3 years ago
5 0

Answer:

d. Smoking

Explanation:

Nicotine is a chemical found in many plants such as tobacco. It is one of the 4000 chemicals that tobacco presents and the main component that acts in the brain.

This chemical is absorbed through the skin and lining of the mucosa of the nose and mouth, or in the lungs by prior inhalation. Nicotine can quickly reach the bloodstream and brain and reach maximum levels. The action of smoking cigarettes causes nicotine to reach the brain in just 10 seconds after inhalation. Although the acute effects dissipate in a few minutes, they cause the need to continue the intake of the substance (addiction)

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Madelyn was to identify cells as plant or animal. How can she pinpoint which are plant cells?
fredd [130]

Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall

7 0
2 years ago
In garden peas the allele for tall plants () is dominant over the allele for dwarf plants() A true breeding tall plant is bred w
marta [7]

Answer: This is called Monohybrid Experiment

Explanation: Monohybrid Cross

P Generation TT     *   tt

  Tall plants     Dwarf plants

F1 Generation  

T T

t Tt Tt

t Tt Tt

In F1 generation;

There are 100% Tt Genotype and 100% Tall plant Phenotype

F2 Generation

F1   *   F1

( Tt   *   Tt )

T t

T TT Tt

t Tt tt

In F2 Generation;

Genotype

There are 25% TT (homozygous dominant, tall plants).

50% Tt (heterozygous tall plants), and

25% tt (homozygous recessive dwarf plants).

This is how dwarf characteristics reappear in the second generation.

The Phenotype of F2 generation is 3:1  (Tall : Dwarf)

I have attached a document to this answer to facilitate effective understanding if there is anormalities in arrangement the Punnet Square.

Download docx
5 0
3 years ago
What is an annealing
slega [8]

Explanation:

heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it.

OR

recombine (DNA) in the double-stranded form following separation by heat.

6 0
3 years ago
Read 2 more answers
Which of the following is an example of a non-falsifiable hypothesis?
OLEGan [10]

Answer: There is a teacup orbiting the Milky Way galaxy.

Explanation: Hello!

To find the correct answer, you need to find a hypothesis that cannot be proven wrong. All but one can indeed be proven wrong. The correct answer is there is a teacup orbiting the Milky Way galaxy because there is no way anyone can tell if there is a teacup orbiting the Milky Way galaxy or not. We know that it can be proven wrong because there is no life on Mars, the human species started in Africa and that humans cannot live without a certain amino acid. The only thing that really can’t be proven wrong is the one about a teacup.

5 0
2 years ago
Earth’s continents are constantly in motion because they sit on top of gigantic plates which float on Earth’s mantle. Energy fro
Andrej [43]

Answer:

a. biomes

Explanation:

Ecology can be defined as the scientific study of the relationship between living organisms such as plants and animals in relation to their physical and biological environment.

An ecosystem can be defined as the natural living habitats of both living and non-living organisms, in which they interact with one another. Essential services such as plant pollination, water purification, nutrient cycling etc that are being provided by the ecosystem are really very vital, important and useful for the sustenance of life, both for humans and enhances social welfare.

Generally, the different continents on Earth are in a constant motion due to the fact that they're sitted on top of gigantic plates floating on Earth’s mantle.

Furthermore, the Earth’s core generate energy which also creates convection currents in the molten layer of the Earth, thereby, moving the plates.

Over an extremely long periods of time, the movement of these plates create new biomes.

In Ecology, a biome can be defined as a relatively distinct terrestrial region which is made up of animals, micrograms and plants, and it is typically characterized by similar environmental factors such as wind, relative humidity, rainfall, temperature, etc., irrespective (regardless) of where it occurs in the world.

There are five (5) main types of biomes and these are;

I. Forest.

II. Aquatic.

III. Desert.

IV. Grassland.

V. Tundra.

7 0
2 years ago
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