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Brilliant_brown [7]
3 years ago
12

Hamish writes down some sentences to summarize the goal of classification.

Biology
2 answers:
denis-greek [22]3 years ago
7 0

Answer:

Option A is correct answer.

Explanation:

  • Researchers sort out the living scene utilizing a procedure called scientific classification, which is the exploration of characterizing life forms dependent on shared structures, capacities, and connections to different living beings. For instance, living beings can be arranged dependent on their cell structure. Living beings that have cores are eukaryotes.
  • Scientific categorization is part of science that gatherings and names creatures dependent on investigations of their distinctive attributes
Sauron [17]3 years ago
5 0

Answer:

Answer A

Explanation:

Researchers sort out the living scene utilizing a procedure called scientific classification, which is the exploration of characterizing life forms dependent on shared structures, , and connections to different living capacities beings.

Also I did the test

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PLEASE HELP I only have tomorrow morning to get my grade up.
Deffense [45]

Answer:

B. The total amount of light in the spectrum tells us the star’s radius.

Explanation:

A.

The effective temperature of a star can be determined by means of its spectrum¹ and Wien's displacement law.                    

Since stars behave in a local way as a blackbody, it will take the wavelength at which is the peak of emission greater in the continuum (see the image below).

Then, the maximum peak of emission () will be replaced in the next equation of the Wien's displacement law:

 (1)

Where T is the effective temperature of the star.

Bodies that are hot enough emits light as consequence of its temperature. For example, a iron bar in contact with fire will start to change colors as the temperature increase, until it gets to a blue color, which its know as Wien's displacement law. Which establishes that the peak of emission for the spectrum will be displaced to shorter wavelengths as the temperature increase.

The same scenario described above can be found in the stars, a star whit higher temperature will have a blue color and one with lower temperature, a red color.

B.

Since star does not have the same size, they have different brightness, That is because the photons have a free mean path greater in a bigger radius.

So a star brightness is a consequence of its radius.

               

C.  

Spectral lines will be shifted to the blue part of the spectrum1 if the source of the observed light is moving toward the observer, or to the red part of the spectrum when it is moving away from the observer (that is known as the Doppler effect).        

By using that shift in the spectral lines, the Doppler velocity can be determined.

 (2)

Where  is the wavelength shift,  is the wavelength at rest, v is the velocity of the source and c is the speed of light.

   

D.  When a photon is absorbed by an electron in an atom of a particular element in the star photosphere, the electron will be pass to a higher state, when it comes back to the ground state, a photon will be emitted again. If the emitted photon does not go in the same direction of the incident photon an absorption line will be created in the spectrum of the star.          

This patterns of spectral lines in the spectrum of the star are compared with the patterns that are got by lamps of that element in a laboratory.

Key term:

¹Spectrum: decomposition of light in its characteristic colors (wavelengths).

7 0
3 years ago
Please help im tryna get a good grade please
ExtremeBDS [4]

Answer:

The correct answer is "B. when the lithosphere slides downhill due to gravity".

Explanation:

Ridge push is a proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges.

3 0
2 years ago
If 35.0 g of CH3OH (MM = 32.0 g/mol) are dissolved in 500.0 mL of solution, what is the concentration of CH3OH in the solution?​
astra-53 [7]

The concentration of CH3OH in the solution is 2.18M

HOW TO CALCULATE MOLARITY:

  • The molarity of a solution can be calculated by dividing the number of moles by its volume as follows:

  • Molarity {M} = no. of moles (mol) ÷ volume (L)

  • According to this question, 35.0 g of CH3OH (MM = 32.0 g/mol) are dissolved in 500.0 mL of solution. The number of moles of methanol is calculated as follows:

no. of moles = 35g ÷ 32g/mol

no. of moles = 1.09mol

  • Molarity = no. of moles ÷ volume

Volume = 500mL = 0.500L

Molarity = 1.09mol ÷ 0.500L

Molarity = 2.18M

Therefore, the concentration of CH3OH in the solution is 2.18M

Learn more at: brainly.com/question/15948514?referrer=searchResults

7 0
2 years ago
Chapter 1: Introduction: Evolution and the Foundations of Biology 1. _______ DNA is composed of building blocks called _____. a.
irina [24]

Answer:

C. Nucleotides

Explanation:

Nucleic acids are macromolecules which are polymers of nucleotides. There are two types of nucleic acids namely: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Nucleotides are the building blocks of nucleic acids.

A nucleotide is made up of three components:

- A phosphate group

- A five carbon sugar called pentose sugar. In RNA the sugar is ribose sugar and in DNA the sugar is deoxyribose sugar.

- Nitrogenous bases: There are four different types of bases in DNA: adenine, guanine, cytosine and thymine. In RNA thymine is replaced by uracil. Adenine and guanine are purines whereas cytosine, thymine and uracil are pyrimidines.

Nitrogenous base and sugar together are called nucleoside and when phosphate is also attached then it is called nucleotide.

6 0
2 years ago
Which structure in the cell corresponds with the function of the human lungs
Orlov [11]
The correct answer is mitochondria. Mitochondria is an organelle in the cell that corresponds to the function of the human lungs.It helps the lungs in the biochemical process of respiration and with the energy production (cellular respiration.)
6 0
3 years ago
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