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Lesechka [4]
3 years ago
5

Write a paragraph explaining how eukaryotic cells arose from prokaryotic cells.

Biology
1 answer:
timurjin [86]3 years ago
7 0
Cells are divided into two main classes, initially defined by whether they contain a nucleus. Prokaryotic cells (bacteria) lack a nuclear envelope; eukaryotic cells have a nucleus in which the genetic material is separated from the cytoplasm. Prokaryotic cells are generally smaller and simpler than eukaryotic cells; in addition to the absence of a nucleus, their genomes are less complex and they do not contain cytoplasmic organelles or a cytoskeleton (Table 1.1). In spite of these differences, the same basic molecular mechanisms govern the lives of both prokaryotes and eukaryotes, indicating that all present-day cells are descended from a single primordial ancestor.

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un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo deraza pura, estos apareamie
konstantin123 [22]

Pregunta completa: un caballo negro de antepasados desconocidos fue apareado con cierto numero de yeguas de color rojo de raza pura, estos apareamientos dieron 20 descendientes de colo rojo y 25 de color negros.

A) cual de dichos caracteres fenotipicos es mas probable que este causado por un homocigoto recesivo?

B) segun su hipotesis cuantos individuos de cada clase habrian esperado

Answer:

A) El color rojo es causado por un genotipo homocigota recesivo

B) Se habrían esperado 22.5 individuos negros y 22.5 individuos rojos, que juntos sumarian un total de 45 individuos.

Explanation:

El desarrollo del problema se encuentra disponible en el archivo adjunto

Download pdf
3 0
3 years ago
Do prokaryotic organisms carry out<br> cellular respiration? If so, how?
Stella [2.4K]

Hi

Do prokaryotic organisms carry out  cellular respiration? If so, how?

The answer is yes as well as no, because some prokaryotes like Archeae and some bacteria donot use cellular respiration because they are anaerobic. The Archaea are also known as Methanogens that reduce Carbon di oxide from environment to Methane that is eventually oxidized to NADH (that is used as an energy source).

However, there are some bacteria that use cellular respiration as a source for the energy production.Cellular respiration is a process which occurs in the cells of higher living organisms as well as in cells of some small organisms like Bacteria. During process of cellular respiration in bacteria, glucose is broken down with the help of oxygen into water and Carbon di oxide. In the process of cellular respiration, bacteria just like humans goes through three stepsi.e Glycolysis, Kreb cycle and Electron transport chain that ultimately lead to the production of ATP (energy).

Hope it helps!

5 0
3 years ago
Part B
cluponka [151]

Answer:

The word acidification can be misleading because a pH of 7.9 is still considered slightly alkaline. However, as the graphs in these three locations show, as CO2 rises, the pH drops, moving in the direction of the acidic end of the pH scale.

Explanation:

4 0
3 years ago
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Give two reasons why humans need a balanced ecosystem <br>​
satela [25.4K]

Answer:

us humans need a balanced ecosystem because its what keeps us alive. when having a balanced ecosystem we have cleaned water, purified air, maintained soil, regulates our climate, recycles nutrients, and provides us with food.

6 0
3 years ago
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If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?
finlep [7]

Answer: A

 The cells would lose water and shrink. In a hypertonic solution, the concentration of solute is higher than water in a cell. With this, there is a net movement of water from inside to outside initiating water to lose from the cytoplasm and vacuole causing the cell to shrink due to osmosis and achieve equilibrium.

This process is applied in food preservation where microbial cells will be dehydrated in a hypertonic environment, making them malfunction and preventing them to cause food spoilage.

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3 years ago
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