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mestny [16]
3 years ago
5

7. In contrast to eukaryotic cells, prokaryotic cells

Biology
2 answers:
Anuta_ua [19.1K]3 years ago
6 0
All prokarytoic cells replicate through binary fission.
Akimi4 [234]3 years ago
5 0

Answer:

A. have to use binary fission to divide.

Explanation:

Prokaryotic cells (Greek pro: before, karyon: nucleus/kernel) have their genetic material freely suspended in the cytoplasm and don't have a well-defined nucleus bounded by a nuclear membrane. They are simpler cells as compared to eukaryotic cells. They use binary fission for cell division.

EXAMPLES: Bacteria

Eukaryotic cells ( Greek Eu: true/well, karyon: nucleus, kernel) have a well defined nucleus bounded by a nuclear membrane and their genetic material (DNA) is not freely suspended in the cytoplasm. They are more advanced cells as compared to prokaryotic cells. They reproduce by mitosis. The cell cycle of eukaryotes is divided into

  1. Interphase
  2. M phase/ Mitosis (cell divides)

Interphase is further divided into following stages:

  1. G1 phase (cell increases in size)
  2. S phase (cell copies its DNA)
  3. G2 phase (cell prepares for division)

M-phase/Mitosis is further divided into following stages:

  1. Prophase
  2. Metaphase
  3. Anaphase
  4. Telophase

Interphase is the longest period of cycle and a cell typically spends most of its life in interphase.

EXAMPLES: Human cells, Plant cells

Coming back to the question.

In contrast to eukaryotic cells, prokaryotic cells

A. have to use binary fission to divide.

  • This is the correct answer as prokaryotic cells undergo binary fission.

B. have a cell cycle that includes interphase and mitosis.

  • Eukaryotic cell cycle includes interphase (G1, S, and G2 phases) and mitosis. Interphase and mitosis are not the features of prokaryotic cell cycle.

C. have to pass through the G1 , S, and G2  phases to prepare for division.

  • G1, S, and G2 are the stages of interphase which is a part of eukaryotic cell cycle. These are not the part of Eukaryotic cell cycle.

D. have to go through prophase, metaphase, anaphase, and telophase.

Prophase, metaphase, anaphase, and telophase are stages of mitosis. Prokaryotic cells don't undergo mitosis and hence they don't go through these steps.

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nikitadnepr [17]

Answer:

Surface currents that move in a path similar to the wind currents

Explanation:

One of the reasons of the movement of the surface of the oceans is the force of the blowing wind. When there is a movement of wind over the surface of the ocean, the surface friction is created. Because of this there is an energy transfer between the force of the wind and the surface of the ocean water. This results in the creation of roughness of the surface of the ocean. The more the surface area of the ocean, the more is the transfer of the energy.

3 0
3 years ago
HELLPP! ITS BIOLOGY
larisa [96]

Answer:

So that in a guinea pig cross in the offspring the recessive trait —long hair— can be observed in 25%, the most probable genotype of the parents is heterozygous Ss.

Explanation:

In guinea pigs, for the characteristic<u> hair length, short hair is the dominant allele and long hair is the recessive one</u>.

In order for 25% of the offspring to express the recessive characteristic, the parents must have a recessive genotype, which can be seen in Punnett's Square:

P: <u>Ss X Ss </u>

<em>Alleles     S     s </em>

<em>S             SS   Ss </em>

<em>s             Ss    ss </em>

Where the offspring is:

  • <em>50% Ss with short hair phenotype </em>
  • <em>25% SS with short hair phenotype </em>
  • <em>25% ss whose phenotype would be long hair. </em>

According to this, heterozygous parents for the characteristic long hair in guinea pigs have a 25% chance of having offspring with long hair.

8 0
2 years ago
Why do you have to check the blood types for donor a recipient for an organ transfer
kakasveta [241]

Answer:

because it can cause you severe reaction that could kill you

8 0
3 years ago
Meiosis consists of ______round(s) of dna replication accompanied by _____ rounds of cell division.
Licemer1 [7]
<span>Meiosis consists of one round of DNA replication accompanied by two rounds of cell division.
Before meiosis starts, the cell </span><span>goes through an interphase period in which it grows, replicates its chromosomes to have enough material to divide for the daughter cells.
Unlike mitosis, meiosis has 2 cell division (meiosis I and II). At the end of the first division, </span><span>each cell has half the number of chromosomes of the parent cell. At the end of the second division</span> there is separation of the sister chromatids
6 0
3 years ago
PLEASE ANSWER THIS!
Veseljchak [2.6K]

Answer:

because when you do it on accident it is unintentional and scares you because you werent expecting it. but when you do it on purpose it wont hurt because your brain stops you from doing it so hard that it hurts lol

Explanation:

6 0
3 years ago
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