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expeople1 [14]
3 years ago
13

When does DNA replication occur durring cell division​

Biology
1 answer:
abruzzese [7]3 years ago
3 0

Well, sort of, but not really. There is a bit of ambiguity in what you mean by “<em>cell division</em>”.

In eukaryotes (which I will assume you are studying cell division for), there are two main types of cell division: mitotic and meiotic.

For mitotic cell division, DNA replication occurs during the cell cycle, but in the S phase of interphase … not during mitosis (nuclear division) or cytokinesis (division of the cytoplasm).

However, DNA replication is required in order for mitotic cell division to occur; and DNA replication doesn’t begin until the cell has become ‘committed’ to entering mitosis.

For meiosis, DNA replication also occurs in the S phase of interphase, but only before the first round of cell division (associated with Meiosis I); before the second round of cell division (associated with Meiosis II), DNA replication does not occur.

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Sister chromatids separate during<br> O metaphase<br> O anaphase<br> O telophase<br> O prophase
lord [1]
Anaphase is the answer. In metaphase the chromatids line up next to each other and the spindle attaches to the centroid. In anaphase, the chromatids are pulled apart into opposing sides of the cell by the spindle fiber
6 0
3 years ago
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A species with narrow niches that can survive in a small range of environmental conditions are
Ugo [173]

Answer:

D. Specialist Species

<h2>What is the advantage for species to be specialists, and how can they survive in the presence of opportunistic/generalist species?</h2>

In the setting of specialized habitats or unique situations, specialized species exist. When those conditions and surroundings change, they must adapt or go extinct, thus they must survive while they still exist.

When compared to generalists, they have the benefit of efficiency, which increases the likelihood of survival and, hence, reproduction within certain settings or situations. The generalists, on the other hand, have the benefit of being able to survive in a larger variety of circumstances and have a higher probability of doing so.

Cactuses, which are plants adapted to dry environments, are an example of specialization. More generalist plant species would typically outcompete cacti in most habitats on Earth, but very few of such species could endure the harsh conditions of a desert.

Extreme environmental conditions, competition for limited resources, and "evolutionary arms races" are some of the pressures that cause specialization. Cheetahs sprint quickly both because their prey moves quickly and because quicker cheetahs will be more effective hunters and more likely to procreate. The advantage of specialization is clear when seen from the standpoint of catching the next meal on a daily basis.

My key argument is that specialization's benefits must always be viewed in the context of the environment that generated the selective pressure that resulted in specialization. Although experts are specialists because they must be, their specializations put them in danger.

4 0
1 year ago
Injuries may damage the nerves of any motor or sensory division of the PNS. In which PNS subdivision would a nerve injury be the
Harrizon [31]

Answer:

In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.

Explanation:

In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.

 It is important for survival to fight or respond to flight because it controls the physiological reaction to a risk or danger and this flight and flight response is activated by sympathetic nervous system. This system is a part of automatic nervous system and operated by various interconnected  neuron

4 0
3 years ago
A group of similar cells that perform a common function
Alchen [17]

Answer:

Tissue

Tissue is the group of similar cells that are common in origin to perform particular function. Tissue system is the group of similar tissues that are common in origin and perform particular function. Organs are made up of tissue system.

Explanation:

4 0
3 years ago
Plants take in nitrogen by absorbing:
Vinil7 [7]

Answer:

D

Explanation:

Plants take their nitrogen from the soil which would have been converted by bacteria ...not straight from the atmosphere

4 0
3 years ago
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