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olga2289 [7]
3 years ago
9

WILL GIVE LOTS OF POINTS AND BRAINILIST PLEASE HELP

Biology
2 answers:
bekas [8.4K]3 years ago
6 0
Cyanobacteria which is a type of algae. It conducts photosynthesis and without it there may not have been life today because they didn't need oxygen to survive and in order to have oxygen there had to have been some form of life...
cupoosta [38]3 years ago
3 0
Bacteria is the organism that scientists believe was responsible for changing the composition of the early atmosphere. It changed the atmosphere by using energy from the Sun for photosynthesis, and released oxygen as a byproduct. The change on the atmosphere was so important because it added more oxygen to our atmosphere, which brings us to our current atmosphere composition of 21% oxygen and 78% nitrogen.

Hope this helps!
Please give brainliest:)
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What does data mean for people involved in farming and agriculture?
lara31 [8.8K]

Answer:

paleolithic went to neolithic and thats when the people started to build homes and boats etc

Explanation:

6 0
3 years ago
If the mother is heterozygous and the father is heterozygous what is the genotype probabilities?
PSYCHO15rus [73]
So we’ll just use “R” and “r” for this example. If the mother AND father are heterozygous, then both of their genotypes are “Rr” if you work out the lumber square or use the foil method, the box would look like this: RR on top left, Rr on top right, Rr on bottom left, and rr on bottom right. So the genetic probabilities, using four as the sum would be 1:2:1
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Describe the construction of a recombinant plasmid containing the gene for the green fluorescent protein (GFP) and the insertion
valkas [14]

Answer:

-use PCR to amplify the gene for GFP

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6 0
3 years ago
The first arteries that branch off of the aorta and bring oxygenated blood to the heart muscle are the ________ arteries.
abruzzese [7]
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5 0
3 years ago
One strand of a DNA molecule has the following sequence: 3-AGTACAAACTATCCACCGTC-5. In order for transcription to occur in that s
guajiro [1.7K]

Answer: Promoter

Explanation:

Transcription is the first step in gene expression which consists of copying the DNA sequence of a gene to produce a RNA molecule. There are enzymes called <u>RNA polymerases which perform this process of transcription</u>. These enzymes bind nucleotides (the monomers which are part of the nucleic acids) to create a RNA strand using a DNA strand as a mold.

A promoter is a region of DNA that controls the initiation of transcription of a given portion of DNA to RNA. Therefore they promote the transcription of a gene. <u>The promoter region is composed of a specific sequence of DNA located just where the starting point of the DNA transcription is</u> and contains the information needed to activate or deactivate the gene it regulates. <u>The promoter has a binding site for the RNA polymerase enzyme </u>in charge of mRNA synthesis and when it recognizes this site, transcription begins.

6 0
4 years ago
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