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AnnyKZ [126]
3 years ago
5

You are observing a sample of cells in the lab to determine why they did not

Biology
1 answer:
Tcecarenko [31]3 years ago
6 0
The kinetochore of the chromosomes


Explanation:
What could be damaged that is hindering the spindle fibers from attaching to the chromosomes are the kinetochores of the chromosomes.
At the metaphase stage of the cell division, the chromosomes align at the equator of the cell and the spindle fibers engage each chromosome at a region known as the kinetochore.
The kinetochore is made up of complex proteins and lies around the centromere region of the chromosome. The microtubules of the spindle fibers attach to this region during the metaphase stage.
If the kinetochore is damaged, it means the spindle fiber will not be able to attach to the chromosome.
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Why the location and quality of food sources in the soil are sometimes likely to stimulate random movements by C. Elegans, but a
Kipish [7]

Answer:

The Caenorhabditis elegans dauer state is a hibernation-like state of diapause that displays a dramatic reduction in spontaneous locomotion.

Explanation:

Mutations affecting the neurotransmitter dopamine, which regulates voluntary movement in many organisms, can stimulate movement in dauers. The movement of quiescent animals is stimulated by conditions that reduce dopamine signaling and also by conditions predicted to increase dopamine signaling.The stimulation of movement by increased dopamine is much more pronounced in quiescent daf-2(−) dauer and dauer-like adult animals.

In C. elegans hermaphrodites, dopamine is produced by eight neurons and signals via at least four dopamine receptors, DOP-1 through DOP-4. In addition, a presynaptic reuptake transporter, DAT-1, removes dopamine from the extracellular space to terminate signaling. In C. elegans, dopamine is best known for mediating the “basal slowing response” in which the animal's movement slows when it encounters food..  Dopamine is thought to be released in response to food and to act on motor neurons to modulate the animal's movement . Animals that cannot produce dopamine fail to slow in response to food and exogenous dopamine slows the movement of animals cultured without food.The response to dopamine in this situation is complex, as the absence of specific dopamine receptors can have either positive or negative effects on movement.

8 0
3 years ago
Drinking too much water during exercise can cause a condition in which the concentration of sodium in the blood is lower than no
UNO [17]

Explanation:

People may also drink excessive water because of a psychiatric disorder called psychogenic polydipsia. The result is too much water and not enough sodium. Thus, overhydration generally results in low sodium levels in the blood (hyponatremia),which can be dangerous.

Plz follow me and Mark me as brainlest please

7 0
2 years ago
Africa and South America are 4,000 km apart. If the plates move away from each other at a rate of 30 km per 1 million years, how
yulyashka [42]

Answer:

The majority of the research shows that the plates move at the average rate of between approximately 0.60 cm/yr to 10 cm/yr. Some sources state that in the North Atlantic, the rate of movement is only about 1 cm (about 0.4 in) per year, while in the Pacific it amounts to more than 4 cm (almost 2 in) annually, while others say that plates, in general, travel from 5 to 10 cm/yr.



The Eurasian Plate is moving away from the North American Plate at a rate the is about 3cm per year. That is about the same rate at which your fingernails will grow.



The distance from New York to London is in 3459 miles (5567 km). What will the distance be in 5 million years?.





The distance from New York to London in 5 million years will be 3552 miles (5717 km). So if today it takes us 7 hours and 30 minutes to fly to London at a speed of 460 miles per hour, in 5 million years at the same rate of speed will take us close to 8 hours.

7 0
3 years ago
Read 2 more answers
Bryozoans have several different forms. The branching form is often mistaken for a type of coral. Which is true and can be used
-BARSIC- [3]

Answer:

Bryozoans belong to phylum bryozoa

while corals belong to phylum cnidaria.

Bryozoans are more advanced than corals.

bryozoans have an anus while corals do not have an anus

bryozoans tentacles don’t sting like corals.

4 0
3 years ago
Two students set up the following apparatus in a lab: a pipette was filled with a mixture of yeast and apple juice and inverted
UkoKoshka [18]

Answer:

The most appropriate answer would be carbon dioxide and cellular respiration.

Yeast is a single-celled eukaryotic organism which is capable of doing anaerobic (fermentation) as well as aerobic respiration.

It uses cellular respiration (whether aerobic or anaerobic) for the production of energy, that is, adenosine triphosphate (ATP).

Cellular respiration refers to the set of chemical reactions which are involved in breaking down sugar or glucose to produce ATP. The carbon dioxide is produced as a byproduct.

Thus, yeast breakdown the sugar present in apple juice to produce ATP and carbon dioxide.

This carbon dioxide is released in the form of bubbles.

4 0
3 years ago
Read 2 more answers
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