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3 years ago

Which process does not occur in animal cells? A. respiration B. photosynthesis C. chemical reaction D. protein production

Biology

2 answers:

mestny [16]3 years ago

8 0

B because that only occurs in plants!

Sladkaya [172]3 years ago

6 0

B photosynthesis because that is only in plants

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In DNA fingerprinting explain how DNA moves through the gel

Zielflug [23.3K]

Answer:

B. The smaller DNA pieces travel farthest towards the positive end of the box

Explanation:

Gel-electrophoresis technique is a technique which is used to separate the fragments of DNA based on their size. The technique is employed in the DNA fingerprint analysis.

The DNA samples are loaded on one side of the gel and when an electric current is applied, the DNA moves from the wells towards the electrodes.

The DNA is a negatively charged molecule which travels through pores in the gel and reaches towards the electrode with positive charge. The smaller the size of the DNA fragment, the faster it moves.

Thus, Option-B is correct.

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3 years ago

Which describes the flow of energy in a food chain?

Archy [21]

D. because the sun grows the grass the mouse eats the grass and the snake eats the mouse...

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3 years ago

Can someone help 6th grade science ASAP PLEASE IM BEING TIMED

Anastasy [175]

Answer:

Wood

Explanation:

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3 years ago

What type of transport takes place when a protein allows an ion to enter a cell, but no additional energy is needed to make this

-Dominant- [34]

The answer is facilitated diffusion. It requires no energy because the ions are traveling down the concentration gradient. Facilitated diffusion is important for the regulation of ions in a cell. It also enables ions to pass across the hydrophobic layer of the cell membrane composed of phospholipids.

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3 years ago

The graph above displays the heights of an average population of humans. Use C.E.R. (Claim, Evidence, Reasoning) to answer the f

sladkih [1.3K]

Answer:

The graph shows the height in inches of determined human population and the pattern it shows is due to the height variations that exist between individuals, due to different factors, where the average height in the population is close to 69 inches, and most of the population has heights between 67 and 72 inches.

Explanation:

The height of individuals is the measurement, from head to toe, which is made standing up and barefoot.

The graph shows the frequency of people who have a specific height, where:

Claim: According to the graph, most people are between 67 and 72 inches tall. Heights below 63 and above 72 inches are less frequent and the average person is about 69 inches tall.

Evidence: The data provided by the graph support the claim that there is variation in height in the human population. When data on anthropometric parameters are to be obtained, a sample is chosen, measured under the same conditions and then taken to a graph showing the results.

Reasoning: variations in human height respond to several factors, mainly genetic and environmental factors.

Inheritance plays an important role in determining an individual's height, although it is a polygenic pattern of inheritance, where multiple genes determine the height an individual will have.

In general, the height between men and women differs but, in addition, the inheritance of this parameter is linked to race. There is no single gene that determines whether a person will be tall or short, nor are there dominant or recessive alleles.

The combination of information from several genes will result in the phenotypic expression of height in an individual and can increases the genetic variability for this trait. It should also be taken into account that genetic disorders can affect the development of normal height.

Environmental factors and habits, especially food and family environment, are determinants of the height a particular individual will have.

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4 years ago