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weqwewe [10]
3 years ago
13

The nucleus ______ during prophase

Biology
1 answer:
Nutka1998 [239]3 years ago
3 0

Answer:

The nucleus disappears during the prophase.

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Which structural characteristic is seen in RNA but not in DNA?
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Answer: A single strand

Explaination:RNA and DNA are macromolecules made up of nucleotides organised in chains. DNA has double strands organised in a helical shape.

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3 years ago
A promoter sequence is likely to be (check all that apply):
erica [24]

Answer:

b. orientation dependent

e. located upstream of the gene it controls

Explanation:

Promoter sequences:

These are the sequences present within the DNA on which RNA polymerase binds and start transcription of a gene. These sequences are present directly upstream of transcription initiation site at the 5' end.  

Prokaryotes and Eukaryotes both have specific promoter location site which is fixed. So first (a) and Last (f) options of this question are wrong.

This sequence have specific orientation Like TATA box so these are orientation dependent.

These sequences are present directly upstream of transcription initiation site at the 5' end.

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3 years ago
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3 years ago
When a community grows back after it has been destroyed by fire or farming?
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Secondary succession 
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7 0
4 years ago
Al examinar la aleta de un pez primitivo, los científicos encontraron similitudes entre su estructura ósea y la de los reptiles,
wlad13 [49]

Answer:

evidencia de un antepasado común entre grupos de vertebrados (gnatóstomos)

Explanation:

En el estudio comparativo arriba descripto, se encontraron semejanzas que provienen de un antepasados común. Este tipo de evidencia se conoce como homología, es decir, semejanza entre diferentes grupos de organismos causada por un mismo origen evolutivo. Los gnatóstomos (vertebrados con mandíbula) conforman un grupo de organismos el cual incluye peces óseos, peces cartilaginosos, anfibios, reptiles, aves y mamíferos. En este caso, las extremidades del grupo de los gnatóstomos (las cuales tienen como origen común la aleta de un pez primitivo) son similares porque son estructuras homólogas.

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3 years ago
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