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Murljashka [212]
3 years ago
12

An ecologist conducts a greenhouse experiment to study the effect of water concentration added to soil on the productivity of su

nflower seedlings. what is the independent variable in this experiment?
Biology
1 answer:
Zielflug [23.3K]3 years ago
3 0
An ecologist conducts<span> a </span>greenhouse experiment<span> to </span>study<span> the </span>effect<span> of nitrogen </span>concentration<span> on the</span>productivity<span> of </span>sunflower seedlings<span>. What is the </span>independent variable<span> in this </span>experiment<span>? make predictions about how nature works</span>
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Taking a drug on a short-term basis to contend with immediate distress or pressure describes what type of drug use? intensified
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Hi the answer is circumstantial-situational drug use. Hope this helps.
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!!!!!How do radioactive elements help scientists establish how old rocks and fossils are?!!!!
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Answer:

I will give a hypothesis. Just like a tree, when you cut a tree by its trunk, you will the rings. The rings around it represents the tree's age. So when you cut rock, the pores in the rock determine whether it is an old rock or a fossil rock.

Explanation:

The reason is, if it is limestone and it is an old rock, the pores will be slightly big and if the limestone is a fossil rock, then the pores will be bigger due to leaching or denaturing of the minerals in the rock through the ages.

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A box is sliding at constant velocity. The coefficient of friction between the box and the surface is 0.27. The push force on th
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Candace is wanting to be sure that she is doing what she can to prevent the spread of disease. Which of the following should she
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8 0
3 years ago
Comparing DNA Replication and Transcription
ozzi

The missing information has been completed as:

DNA Tempelate        complementary DNA    mRNA

3' TTACG 5'                5' AATGC 3'                 5'UUACG 3'

       

3' AAUGC 5'                  5' TTACG 3'            5'UUACG 3'

3' GGCGG 5'                  5' CCGCC3'          5' CCGCC3'

' 3'TGCATCG5'               5' ACGTAGC 3'     5' ACGUAGC 3'

3' AGACTC 5'                 5' TCTGAG  3'       5' AGACTC 3'

3'GATAAGA 5'               5' CTATTCT 5'         5' CTAUUCA 3'

3' CTGGCTAC5'           5' GACCGATG 3'    3'CUGGCUAC 5'

Explanation:

Some of the sequence of DNA given is in 3' to 5' direction, mRNA sequence is also given.

The DNA is double stranded helix which replicates by semi conservative mode. The two strands unwind to act as a template for other strands. In transcription the 3' to 5' strand acts as a template because RNA synthesis takes place in 5' to 3' direction. mRNA is single strand. It has nucleotides in it from which 3 base pairs acts as a code for amino acid.

The following table shows DNA strand having complementary sequaence and mRNA synthesized.

 DNA Tempelate        complementary DNA    mRNA

3' TTACG 5'                5' AATGC 3'                 5'UUACG 3'

       

3' AAUGC 5'                  5' TTACG 3'            5'UUACG 3'

3' GGCGG 5'                  5' CCGCC3'          5' CCGCC3'

' 3'TGCATCG5'               5' ACGTAGC 3'     5' ACGUAGC 3'

3' AGACTC 5'                 5' TCTGAG  3'       5' AGACTC 3'

3'GATAAGA 5'               5' CTATTCT 5'         5' CTAUUCA 3'

3' CTGGCTAC5'           5' GACCGATG 3'    3'CUGGCUAC 5'

3 0
3 years ago
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