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3 years ago

1. Which of the following events is not a source of genetic variation in eukaryotic organisms?

Biology

1 answer:

Lunna [17]3 years ago

5 0

Answer:

Mitosis

Explanation:

Mitosis is not a source of genetic mutation because it take place mostly in the somatic cells. This is because it does not lead to the production of gametes . In mitosis, the parent cells divide into two daughter cells and each daughter cells are genetically identical to the parent cell because they carry the same number of chromosomes as the parent cell. There is no genetic variation in this.

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Flow Chart What happens to food and energy when it enters the cell? Finish the description for each organelle. Step 1: Mitochond

torisob [31]

Explanation:

Eukaryotic cells have specialized mechanisms to transport molecules along with membrane-bound organelles like the endoplasmic reticulum that provide a higher surface area for absorption and enable more efficient transportation.

Their structural components (i.e. their makeup) determine their function (what they do). In specific cell types, collected proteins may function as a unit called an organelle. Some organelles are bound by membranes like those that make up the external structure of the cell, with varying compositions of phospholipids and proteins. Several organelles facilitate the digestion of nutrients into metabolites and energy...

Step 1: Mitochondria break down food and release energy; In all eukaryotic cells mitochondria are small cellular organelles bound by membranes. The higher concentrations of reactants and solutes, increases metabolic reaction efficiency; these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is obtained via the breakdown of nutrients from food, and is stored within the molecule ATP. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate (through the process of glycolysis in the cytoplasm) where several metabolites used for building other compounds are produced.

Step 2: Lysosomes... Some organelles separate proteins and molecules that may harm the cell by parceling them into membrane-bound organelles for example, proteases bound within lysosomes can break down many structural proteins, and carbohydrates found in food, waste, and cell components

Step 3: Vacuoles... Vacuoles are fluid filled organelles which store concentrated amounts of solutes, and waste products. Specialized vacuoles are also used to transport components to the cell membrane for cellular export.

Step 4: The endoplasmic reticulum... Most proteins that function in the cytosol (such as actin) or in the nucleus (such as DNA polymerase) are synthesized by free ribosomes. Proteins that function within the endomembrane system (such as lysosomal enzymes) or those that are destined for secretion from the cell (such as insulin) are synthesized by bound ribosomes in the rough endoplasmic reticulum. The rest of the ER, which does not contain ribosomes is called the smooth ER, and may contain lipids, enzymes, and other proteins. As a protein destined for the endomembrane system is being synthesized by a ribosome, the first amino acids in the growing polypeptide chain act as a signal sequence. That signal sequence ensures that the ribosome binds to the outer membrane of the ER and that the protein enters the ER lumen.
Step 5: Golgi bodies... Like a post office, the golgi complex, or golgi body recognizes signal sequences and packages these compounds into lysosomes for delivery to their final destination. Lysosomes fuse with the plasma membrane to empty their contents into the extracellular space.

Learn more about cellular life at brainly.com/question/11259903

Learn more about mitochondria at brainly.com/question/8427362

Learn more about mitochondria and similar structures at brainly.com/question/2855039

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3 0

3 years ago

What is the original source of almost all energy in most ecosystem

lorasvet [3.4K]

Sunlight is the original source of almost all energy in most ecosystem.

4 0

3 years ago

What can be interpreted about type 2 diabetes mellitus in monozygotic twins when it affects only one twin 70% of the time and af

Masja [62]

Answer:

The correct option is <em>C. Non-genetic factors can influence expression.</em>

Explanation:

Non- genetic factors can be described as factors other than genetic makeup. These factors include environmental factors and factors arising from the lifestyle of an organism.

Certain studies have shown that both the genetic as well as the non- genetic factors play a role in the development of certain characteristics.

In the above-mentioned scenario, both the monozygotic twins have diabetes but one of them is affected 70% of the time due to his lifestyle. The person might be consuming more sugars and alcohol.

4 0

3 years ago

At a fair or circus, some performers and clowns take long balloons and fold them into animals and objects as toys for children.

mixer [17]

The statement which explains why a balloon can fold, twist, and bend without bursting is: B. The balloon is filled with air, which is a mix of gases. Air is fluid and can move around the inside of the balloon as it is folded.

A balloon can be defined as a flexible rubber bag that can be inflated with a gas such as air.

Generally, air can be trapped in a balloon by sealing its neck tightly.

Hence, this makes it possible for performers and clowns to fold, twist, and bend an inflated balloon into animals and objects as toys for children.

A inflated balloon can be folded without it bursting simply because air is fluid and as such, it would move around the inside of the balloon as it is folded.

In conclusion, air, which is a mixture of gases would move around the inside of the balloon as it is folded because it is also a fluid.

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2 years ago

Suppose a chemical was to spill onto the ground and get into the soil. The

chubhunter [2.5K]

Answer:

To clean groundwater you must:

Explanation:

Eliminate the pollution source: An underground tank must be pumped dry and then dug out from the ground. A factory must be required to stop releasing toxic chemicals. Farms must be more careful about the chemicals they put on their fields.

Monitor the extent of the pollutant: Scientists test water in wells. Sometimes they drill wells to test water. They learn how the groundwater is flowing: how fast and in what direction. They study the contaminants in the groundwater. Then they determine where the contaminant plume is going.

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2 years ago