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stellarik [79]
3 years ago
12

Human activities, particularly the combustion of ____________, are altering the climate by increasing CO2 in the atmosphere.

Biology
2 answers:
harina [27]3 years ago
8 0

The answer is A) fossil fuels

Contact [7]3 years ago
7 0
A. fossil fuels is the correct answer
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Sustainable fishing means catching as many fish as possible, not matter what size the fish
gogolik [260]

Answer:

FALSE

Explanation:

the point of sustainable fishing is to catch a certain number of fish so that the fish population they are collecting from does not decline at a dangerous rate.

4 0
4 years ago
Complete the flowchart to show the steps required to analyze gene activity using a microarray. preparing the cdna probe
Scilla [17]
1- Preparing the cDNA:
  a- Using two different tissue samples (such as control and cancer cells), isolate mRNA.
  b- For each sample, prepare complementry DNA (cDNA) from the isolated mRNA. Then fluorescent label cDNA of each sample with a different color and then mixed.

2- preparing the microarray:
  a- Bind DNA fragments of different genes to microarray wells.
  b- Attach ssDNA (single-stranded DNA) to microarray wells.

3- Combine the probe and the microarray samples:
Add labeled cDNA to the microarray wells. 

7 0
3 years ago
If a person with a mass of 70 kg is standing on top of a cliff that is
Vilka [71]

Answer:

C. 2,100 J

Explanation:

PE = 20593.965 J

m = 70 kg

g = 9.80665 m/s2

h = 30 m

8 0
3 years ago
How many different amino acids are commonly found in proteins?
Afina-wow [57]
20 different amino acids are found in protiens
5 0
3 years ago
DNA coils tightly during division and assembles into visible ___________.
rosijanka [135]

Answer:

chromosomes

Explanation:

DNA of organisms is organized into one or more thread-like structures called chromosomes. Chromosomes are made of DNA and its packing proteins.  During cell division, the thin mass of chromatin which in turn is made of DNA and its packing protein condense and becomes visible as individual chromosomes. The DNA molecule is wrapped around histone proteins to form nucleosomes which in turn become compact into chromatin fibers.

The further condensation of looped domains formed by the coiling of chromatin fiber forms chromosomes. The part of a chromosome that holds its two arms together is called centromere. Chromosome becomes visible during the prophase stage only when condensation of chromatin takes place.

6 0
3 years ago
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