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Charra [1.4K]
3 years ago
7

Louis Pasteur's experiments showed that bacteria did not grow in a flask unless they first entered from the surrounding environm

ent. What part of the cell theory did this prove?
A - New cells come from preexisting ones
B - All living things are made up of at least one cell
C - Cells are the basic units of life
D - All cells are surrounded by a thin membrane​
Biology
1 answer:
lesya692 [45]3 years ago
6 0
D) All cells are surrounded by a thin membrane
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On November 4, 2016, the Paris Agreement brought many nations into a common cause to combat climate change and adapt to its effe
rosijanka [135]

Answer:

Humans are increasingly influencing the climate and the earth's temperature by burning fossil fuels globally as well as locally that puts the everything on risk.

Explanation:

Many nations are coming together with a common goal to fight with the climate change and its various impacts on the global level, is a very good initiative for the better future and human well fare.

Humans are continuosly exploiting the natural resurces and influencing the climate by increasing green gases which increases the temperature of the earth by buring fossil fuels, deforsting, industrilizing and many more direct and indirectly. This is not occur in local level alone but it is golbal problem which result in climate change, melting of glacier increasing sea level and manny more.

5 0
3 years ago
Resethelp 1. Structure describes the alpha-helices and beta-sheets that are formed by hydrogen bonding between backbone atoms lo
ss7ja [257]

1. Answer;

-secondary structure;

Explanation;

Protein secondary structure refers to regular, repeated patterns of folding of the protein backbone. The two most common folding patterns are the alpha helix and the beta sheet. In an alpha helix, the polypeptide backbone coils around an imaginary helix axis in clockwise direction. In the beta sheet secondary structure, the polypeptide backbone is nearly fully extended. The R-groups are alternately pointed above and then below the extended backbone.

2. Answer;

- Quaternary structure

Explanation;

-Many proteins are formed from more than one polypeptide chain. The Quaternary structure describes the way in which the different subunits are packed together to form the overall structure of the protein. For example, the human hemoglobin molecule shown below is made of four subunits.

3. Answer;

-Tertiary structure

Explanation;

Tertiary structure refers to the overall folding of the entire polypeptide chain into a specific 3D shape. The tertiary structure of enzymes is often a compact, globular shape.

The tertiary structure is the structure at which polypeptide chains become functional. At this level, every protein has a specific three-dimensional shape and presents functional groups on its outer surface, allowing it to interact with other molecules, and giving it its unique function.

4. Answer;

Primary structure

Explanation;

-It is the simplest level of protein structure and is simply a sequence of amino acids in a polypeptide chain. For example, the hormone insulin has two polypeptide chains, A and B. Each chain has its own set of amino acids, assembled in a particular order. For instance, the sequence of the A chain starts with glycine at the N-terminus and ends with asparagine at the C-terminus, and is different from the sequence of the B chain.

7 0
3 years ago
What is gained from each part of aerobic respiration?
Aneli [31]

Answer:

Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. ... This results in a net gain of two ATP molecules. Life first evolved in the absence of oxygen, and glycolysis does not require oxygen.

<h2><em><u>Hope this helps..</u></em></h2>
5 0
3 years ago
As much as 25 percent of the fruits and vegetables grown in Chinese agricultural regions rot before they can be transported the
irinina [24]
I think it is a I hope this help you
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3 years ago
Scientists have evidence that meteorites have come from which option of locations?
Step2247 [10]

Mars and Moon are the locations from which meteorites would come.

Option (c);

<u>EXPLANATION: </u>

  • The meteorites found on Earth look like martian crystal rocks.
  • These might be first ejected into space during a collision of an asteroidal object with Moon or Mars and then it got into the Earth orbit because of the force produced during the collision.
  • There are around seventy meteorites recognised to have come from the planet Mars till up to the present date.
  • There are three types of meteorites such as Martian meteorites and a sample of two lunar meteorites.
  • To identify the origin of the meteorite, the scientist tries to identify the type of rock followed by analysing the chemical composition and then try to identify its age.
8 0
3 years ago
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