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NARA [144]
3 years ago
15

What is a mitochondrium?

Biology
2 answers:
Delvig [45]3 years ago
8 0

The power house of the cell

only thing I remember from freshman year

leonid [27]3 years ago
4 0

An organelle of the cell cytoplasm consisting of two sets of membranes, a smooth continuous outer coat and an inner membrane arranged in tubules or more often in folds that form platelike double membranes called cristae.

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During which phase of meiosis does each of the following events occur?
lubasha [3.4K]

Answer:

(a) crossing over: Meiosis I, Recombination  

(b) chromatids separate at their centromeres and migrate to opposite poles: Meiosis II, Anaphase II

(c) chromosomes become aligned in pairs at the equator: Meiosis II, Metaphase II

Explanation:

Homologous recombination is a type of genetic recombination that occurs during meiosis (formation of ovum and sperm cells). The paired chromosomes of the male and female parents are aligned so that similar DNA sequences intersect. This crossing over produces an exchange of genetic material, which is an important cause of the genetic variability observed in the offspring.

Meiosis II: Anaphase II. The centromeres separate and the daughter chromatids - now individual chromosomes - move to the opposite poles of the cell. The centromeres separate, and the two chromatids of each chromosome move toward the opposite poles in the spindle.

Meiosis II: Metaphase II. Chromosomes are accommodated in the equatorial plate of metaphase, similar to what happens in mitosis. They are attached to the already fully formed meiotic spindle. Each chromosome is aligned in the equatorial plate of the metaphase, as it happens in mitosis.

6 0
3 years ago
Select all the correct answers
Mamont248 [21]

Option 1 is the correct answer

4 0
3 years ago
Read 2 more answers
What is/are one source of sediment along shorelines and on the seafloor?
inysia [295]

Answer:

Transport of tidal waves and currents

7 0
3 years ago
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A travel time graph can be used to find the?
Vinvika [58]

A travel time graph can be used to find the distance of any earthquake epicenter.

A travel time graph is a graph of the time, usually P or S waves that is taken at various points as a function of distance from the epicenter of an earthquake seismic source. Information about the earth’s interior is obtained using the velocity of seismic waves through various substances.

8 0
3 years ago
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In which energy level are valence electrons located?
KengaRu [80]

Elements in the first row (hydrogen and helium) will have outer electrons in the first energy level. Their principal quantum number is 1. Elements in the second row (lithium through neon) will have valence electrons in the second energy level with a principal quantum number of 2.

4 0
3 years ago
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