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Zanzabum
3 years ago
5

Could animals have lived on ancient Earth before green plants? Explain.

Biology
1 answer:
creativ13 [48]3 years ago
4 0
No, because animals feed off of plants, which create oxegyn
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What is the time period of grapolites
Bond [772]

Answer:

Graptolites lived from the Cambrian Period, about 510 million years ago, disappearing in the Carboniferous Period, around 320 million years ago.

hope this helps!

5 0
3 years ago
What provides instructions to a eukaryotic cell about living and growing?
Aneli [31]
The correct answer is DNA
4 0
3 years ago
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Find the prokaryotic promoter sequences; Draw boxes around them, Circle the start codon. Then transcribe the following DNA seque
Degger [83]

Explanation:

The transcription is a process which transcribe the DNA into a molecule which could be read by the machinery to translate it into the proteins and that molecule is known as the mRNA molecule.

1.The mRNA molecule is transcribed by an enzyme called RNA polymerase which transcribe DNA in 5'to 3'direction that is DNA strand will be 3' to 5'direction therefore the strand with 3' to 5' will act as template strand.

2. The RNA polymerase binds at promoter region and there are two sequences in prokaryotes at -35 end which is TTGACA and at -10 end which is TATAAT.

3. The translation begins after the start codon which is AUG therefore proteins will be synthesized after AUG.

In the given question, both promoter sequence are present in the 5'to 3'strand

3’GTAACTGTCGAACTACTGTCTACGTCATATTACGCTAATCGATACTGCCTGCATCGATCGTCGACTGCGGTCCGAA

The mRNA will be -

5'- CAUUGACAGCUUGAUGACAGAUGCAGUAUAAUGCGAUUAGCUAUGACGGACGUAGCUUAGCAGCUGACGCCAGGCUU-3'.

There are two start codon thus two polypeptides will be synthesized.

1. met-thr-asp-ala-val

2. met-thr-asp-val-ala-ser-ser

7 0
3 years ago
In which process does water move from the land to the air?
joja [24]
The question is B because the water move from the land to the air
4 0
3 years ago
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In chickens the dominant allele Cr produces the creeper phenotype (having short legs). However, the creeper allele is lethal in
Svetllana [295]

Answer:

66.6% of the living progeny would be creepers

Explanation:

The creeper allele is Cr for both parents this means that there is a 50% chance that they will pass the C or r trait to their progeny. In this scenario the deleterious inheritance of rr will be 25% so this will not be factored in this answer. The other progeny is CC 25% and Cr 50% for genotype only

The new calculation for living progeny is this: Of the chances of three living progeny there could be one normal CC and two creepers Cr. This means that 33.3% of the living progeny is normal CC and 66.6% of the living progeny are creepers Cr.

4 0
4 years ago
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