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RoseWind [281]
3 years ago
6

The first organisms on Earth were most like today's

Biology
1 answer:
mezya [45]3 years ago
3 0

Answer:

O Autotrophs anaerobic

hope it will help you

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You are involved in an experiment involving fluorescent painting of chromosomes. You observe the following in a nucleus experien
Galina-37 [17]

Answer:

It seems that a reciprocal translocation is going on.

Explanation:

A translocation occurs when a chromosomal fragment changes its location in the same chromosome from the original to a new one. Or when it leaves the chromosome to re-locate in a new different chromosome.

According to this, there are different types of translocations:

  • Intrachromosomal translocations:
  1. Intra-radial: the change in position occurs in the same arm of the chromosome. For instance, 123.456789 → 123.478569
  2. Extra-radial: The change in position occurs from one arm to the other of the same chromosome. For instance, 123.456789 → 15623.4789
  • Extrachromosomal translocations:
  1. Transposition: not reciprocal interchange. The fragment leaves a chromosome to re-locate in another chromosome. The other chromosome does not send any fragment to the first one.
  2. Reciprocal translocation: There is a reciprocal interchange. A fragment of chromosome A goes to B, and a fragment of chromosome B goes to A.

Reciprocal translocations might be:

  1. Fraternal: the interchange occurs among homologous chromosomes
  2. External: the interchange occurs among non-homologous chromosomes

Reciprocal translocations are easily recognized during meiosis because an association between four chromosomes can be observed.  This association is a quadrivalent structure.

During metaphase 1, the centromeres involved in the quadrivalent originate centromeric co-orientation or disjunction.

4 0
3 years ago
Relate the structure of the cell membrane to its function of movement of substances into and out of the cell?
Nimfa-mama [501]
The outside of the phospholipid membrane is hydrophilic which attracts water and the inner lipid layer is hydrophobic which repels water causing water to be pulled into or out of the cell based on the concentration gradient of solutes
3 0
3 years ago
What are the base sequences in trna called? <br><br>exons <br>anticodons <br>introns <br>codons
stealth61 [152]
Codons
The mRna bases are grouped into sets of three, called codons. Each codon has a complementary set of bases, called an anticodon.
4 0
3 years ago
Read 2 more answers
What species traits or other biological phenomena might you start tracking to determine if the biota is responding to climate ch
oee [108]
The only thing I can think of is how many gill flaps(of a fish), how often or speed of movement, and how fast it eats? I did a lab with a goldfish studying metabolism and counted the amount of gill flaps every 60 seconds with different temperature water. Hope it helps!
4 0
3 years ago
Glial cells that surround the neurons in ganglia are:
gizmo_the_mogwai [7]

Answer:

Explanation:

Satellite cells are small glia that surround neurons' sensory ganglia in the ANS. These resemble the astrocytes of the CNS and assist in regulating the external chemical environment. PNS satellite glia are very sensitive to injury and may exacerbate pathological pain.

6 0
3 years ago
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