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Papessa [141]
1 year ago
5

Cells from an advanced malignant tumor most often have very abnormal chromosomes, and often an abnormal total number of chromoso

mes. Why might this occur?

Biology
1 answer:
Vera_Pavlovna [14]1 year ago
4 0

Answer:

This happened because the check points in cell cycles are not working properly which can help to stop cells having abnormal chromosomes.

See the attachment for proper understanding what actually happened in cell cycle check points.

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A sodium-potassium pump _____. moves three potassium ions out of a cell and two sodium ions into a cell while producing an atp f
SVETLANKA909090 [29]

Move three sodium ions out of a cell and two potassium ions into a cell while consuming an atp for each cycle

Explanation:

By pumping three (3) Na+ to the outside and two (2) K+ to the inside of the cell, there is a net positive charge on the outside leaving the inside of the cell electronegative. This process is achieved by the Na+/K+ pump and is a process that consumes ATP energy.

This is much more important in a neuron cell who ¾ of its energy is used to maintain  a -70mV resting potential that is important for the nerve to pass impulse when depolarised.

In other cells, the gradient created in important in maintaining the homeostatic osmolarity inside the cell to avoid swelling and lysis of cells due to uptake of excess water by osmosis. The Na+ gradient is also used to import other molecules into the cell such as glucose and amino acids. These molecules are coupled with Na+ and then are absorbed efficiently as the Na+ flow back inside the cell down the Na+ concentration gradient.

Learn More:

brainly.com/question/12673972

brainly.com/question/8858309

#LearnWithBrainly

4 0
1 year ago
Summarize what happened to the fish in loberg lake include an explanation for why it happened.
STALIN [3.7K]
The Stickleback fishes regrew in their assigned and adapted niche

According to sources, the most probable answer to this query is that this shows how species, for example, fishes can still evolve. And that evolution is a tangible explanation for such event, 

Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
3 0
1 year ago
What advantages are there for larger organisms to subdivide themselves into cells
WINSTONCH [101]

Cell division occurs in all living organisms. This is known as mitosis.

The advantages of a larger organisms to subdivide themselves into smaller cells is that as all organisms grow, some of their cells die or get damaged with time and need replacements. So,it divides into smaller cells because when a cell becomes large, it demands more of cell places of its DNA. If the cell grows too large, it will have trouble moving enough nutrients and wastes across the cell membrane. So to grow properly the cells need to be divided.


5 0
1 year ago
Read 2 more answers
Which of the following best explains the potential health problems associated with endocrine disruptors? A) Endocrine disruptors
erica [24]
B) Endocrine disruptors mimic hormones that regulate critical biological processes
6 0
2 years ago
Do you think true water-conducting tissue is a derived character of either embryophytes or green algae? Why or why not?
ludmilkaskok [199]

Answer:

i think true water-conducting tissue is a derived character of green algae?

Explanation:

WHY?

Many characteristics of land plants also appear in algae like both are multi cellular, euks, photosynthetic autotrophs so are brown, red, and certain green algae, plants have cell walls made of cellulose and so do green algae

However, charophytes are the only present day algae that share these traits with land plants

1.Rings of cellulose-synthesizing proteins (circular rings of proteins in plasma membrane that make cellulose of cell wall)

2.Structure of flagellated sperm

3.Formation of a phragmoplast ( group of microtubules known as phragmoplast formes b/t daughter nuclei of a dividing cell, giving rise to a cell plate making cross wall that separates the daughter cells)

Comparisons of both nuclear and chloroplast genes point to charophytes as the closest living relatives of land plants

Land plants are not descended from modern charophytes, but share a common ancestor with modern charophytes

WHY NOT?

The origin of embryophytes, as these multicellular plants arose and conquered the land, was a pivotal event in the history of life on earth. Without embryophytes, there would be no animals or humans surviving on the land portion of our planet. The provide food, habitat, energy, oxygen, protection, and numerous vital other functions for the world's creatures. Human beings also benefit from the aesthetic beauty, medicines, and innumerable products derived from these diverse plants.

8 0
1 year ago
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